Today, Christina and her friend are enjoying themselves. This morning they got up very early and drove out of San Francisco. They crossed the Bay Bridge before the early morning commute and drove south. Because it was so early, there were almost not cars.
After driving an hour and a half, they stopped to had breakfast. They ordered pancakes and coffee. They also had some fresh fruits. When they finished eating, it was 7 o’clock. Then they got back into the car and drove south. Christina wanted to listen to music, so they turned on the radio. An hour later they stopped for gas. They noticed that there was also a charging station for electric cars.
It’s now 1:15 and they are in Yosemite Park. They have been there for two hours, since 11:15. They are looking at the Yosemite falls, which is the highest waterfall in the park. The water drops a total of 740 meters from the top of upper fall to the base of the lower fall.
In another 15 minutes they plan to eat lunch at a magnificent old hotel in the park. It was built in 1927 and has a great view. They wanted to stay there, but they couldn’t get reservation. To get a room at that hotel you usually need to make reservations several months in advance.
They plan to stay in the park until around 4 o’clock. By then they will have been in the park for nearly 5 hours. Then they’ll get back into the car and drive back to San Francisco. They plan to eat dinner somewhere along the way. If the traffic isn’t too bad, they should be back in San Francisco by 10 o’clock.
Early tomorrow morning they are going to cross the Golden Gate Bridge and go north along the coast. From some places, you can look out on the ocean and see whales and other sea life. Christina has never seen a whale before, so she’s looking forward to it. And tomorrow night they have something special planned. They are going to watch a baseball game. Christina has never seen a baseball game, but she has heard that it is very popular in the US. And the San Francisco baseball team is one of the best.
A force is the push or a pull on the object. A force changes the motion of a moving object.
A force can be strong or weak and it always has a direction.
The earth is a planet that goes around the sun in the circular orbit. The speed of its motion doesn’t change and the direction of its motion does. The earth has a layer of gas above its surface, which helps to support life.
Atoms are the building blocks of matter. At the center of an atom is its nucleus, which has a positive electric charge. Outside the nucleus are electrons, which have a negative charge.
Asteroids and comics are object that orbits our sun, but are smaller than planets. Asteroid that pass close to the earth are called the near-earth objects. The layer of gases, just above the earth surface, is our atmosphere. The atmosphere is made up of gases, such as oxygen and hydrogen. Without an atmosphere, there will be not life on the earth.
Asteroid n.[天]小行星;海盘车;海星 adj.星状的
orbit n.轨道;眼眶;势力范围;（人生的）旅程，生活过程
vt.& vi.在…轨道上运行，环绕轨道运行
vi.盘旋;绕轨道运行
vt.绕轨道而行;进入轨道
The two lines on the left intersect each other at a right angle which is 90 degrees. The 2 lines on the right are parallel, which means they never cross.
The adjacent sides of rectangle are perpendicular, which means they meet at a 90-degree angle. The opposite sides of the rectangle are equal a parallel, which means they never cross. The area of a rectangle is the length times the width.
Intersect vt.横断，横切，横穿 vt.& vi.（指线条、道路等）相交，交叉
A circle is the 2 dimensional figures with radius and circumference which is the distance around the circle. The area of the circle is π R square, where r is the radius and Pi is the ratio of the circle’s circumference to its diameter.
Radius n.桡骨;半径范围;半径（距离）;用半径度量的圆形面积
Dimensional adj.维的;尺寸的;<物>量纲的;<数>因次的
A sphere is a 3 dimensional figure with the a ratio and volume, which is the three-fourth πR cube. All points on the surface of the sphere are equidistance from its center.
Cube n.立方形，立方体;立方，三次幂;小房间
vt.求…的立方;把（食物）切成小方块;测定…的体积
equidistance 等距离的
A right triangle is a 2 dimensional figure with 3 sides, 2 of which are perpendicular. To find its area, multiply the length of the 2 perpendicular sides, A and B and divided by 2, A equates one half A B.
Perpendicular
adj.垂直的，成直角的;直立的，险陡的;[建]垂直式的;〈谑〉直站着的
n.垂直线，垂直面;直立，直立姿势，廉直;垂直测器，锤规;[建]垂直式建筑，绝壁
Equate vt.等同;使相等;相当于
the electric force between the nucleus and the electrons holds the atom together.
A force can increase or decrease the speed of an object, and it can change the direction of motion.
M：Have you finished eating yet.
F：Not, I haven’t.Why are you in such a hurry.
M：I’m sorry, but you are such a slow eater.
F：A low eater? Well I try to enjoy my food. You just eat and swallow. I don’t see how you can even taste it.
M：Ok, I’m sorry. Do you mind if I get another glass of vine.
F：No, go ahead. I don’t want you to sit there putting pressure on me. I thought we were going to have a relaxing evening.
M：Yes, you are right. I’d like to relax, but I had a lot on my mind.
F：What created?
M：Yes. it is. I’ve been getting some strange emails from my boss. He wants me to cut down on my expenses. Maybe he wants to fire me.
F：Is business bad?
M：Yes, it is. But I don’t want to talk about it.
F：Ok, but I’m a good listener. You can tell me if you’d like to.
M：Thanks, maybe some other time. I’ll try to start thinking about it and deal with it tomorrow.
F：Good idea. You need to take a break from work. Your health is important and so am I.
M：Yes, you are. I don’t know what would I do without you.
小礼物走一走，来关注我
作者：fine08
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