每日科技英文43:html5 webgl 2d引擎PixJS特点

今日要点:

1. PixJS引擎介绍
2. 情态动词之比较can,could和be able to

PixJS v4

• The HTML5 Creation Engine

Create beautiful digital content with the fastest, most flexible 2D WebGL renderer.

• to create sth with sth:用...创建...

• digital content: 数字内容

Fast

PixiJS' strength is speed. When it comes to 2D rendering, PixiJS is the fastest there is.

• strength: 优点，长处

• when it comes to sth: 非常有用的一句句型，可以翻译为: 一说到...，要说...

• the fastest: the+形容词:表示一类人或物，例如the rich富人，the impossible 不可能做到的事.....

Flexible

Friendly, feature-rich API lets PixiJS take care of the fundamentals whilst you focus on producing incredible multiplatform experiences.

• friendly：友好地

• feature-rich: 形容特色比较丰富的，功能强大的

• to take care of: 照顾，体贴

• the fundamentals[ˌfʌndə'mentlz]: 基础，基本原则

• whilst:连词，与此同时

• to focus on doing sth:专注于做某事

Free

PixiJS is and always will be Open Source, with a large and supportive community pushing its growth and evolution.

• is and always will be: 现在以及未来都...

• with a large and supportive community: 拥有一个庞大的，互助的社区

• pushing its growth and evolution: 推动其成长与演变

PixJS网址

今日语法小知识:情态动词之:比较can,could和be able to

1. can/could 表示能力；可能 (过去时用could),
   只用于现在式和过去式(could)。be able to可以用于各种时态。
   They will be able to tell you the news soon. 他很快就能告诉你消息了。

2. 只用be able to
   a. 位于助动词后。
   b. 情态动词后。
   c. 表示过去某时刻动作时。
   d. 用于句首表示条件。
   e. 表示成功地做了某事时，只能用was/were able to， 不能用could。
   He was able to flee Europe before the war broke out.
   = He managed to flee Europe before the war broke out.

could不表示时态时的用法:

3. 提出委婉的请求，（注意在回答中不可用could）。
   --- Could I have the television on?
   --- Yes, you can. / No, you can't.

4. 在否定，疑问句中表示推测或怀疑。
   He couldn't be a bad man.
   他不大可能是坏人。