Guiding questions:
1. Why would we have dessert even when we are sated?
Our sense of taste, of course, will function as a effective tool to screen the food for value and safety. Because of this, like the author writes, taste has two powerful instinctual biases. The positive one, predisposes us towards us to sweetness, contributing a lot to this consequence.
2. Why teaching is so energy consuming?
This is a relative question to the previous one. The adult brain accounts for 2 percent of our body weight but consumes 18 percent of our energy, all of which must come from a carbohydrate. Just as programming consumes energy, and as solving maths problems costs energy, so teaching is so energy consuming.
I was about as ill prepared to hunt the former and gather the latter as an eater could possibly be.
1. ill
We know that ill always means you're not feeling well or get hurt. In in situation, ill has another meaning.
If you say that someone can ill afford to do something, or can ill afford something, you mean that they must prevent it from happening because it would be harmful or embarrassing to them. 难以承受[正式]
例句：It's possible he won't play but I can ill afford to lose him.
造句：I work really hard on my upcoming test because I can ill afford to fail it.
For most of us today hunting and gathering and growing our own food is by and large a form of play.
2. by and large
in general/ on the whole
So though a hunter-gatherer food chain still exists here and there to one degree or another, it seems to me its chief value for us at this point is not so much economic or practical as it is didactic.
here and there to one degree and another
I like this expression a lot. It could be useful in many situations.
The desire was one thing, fulfilling it quite another.
This sentence uses the absolute construction, making others feel ingenious the subject in the first half part used as an object in the second half part.
Angelo Garro is a stout, burly Italian with a five-day beard, sleepy brown eyes, and a passion verging on obsession about the getting and preparing of food.
I like it because of the adjectives. They're vivid and showing a sense of image as if Angelo Garro is standing in front of me.