be什么意思、怎么读？单词用法、记忆法、发音音标、反义词同义词辨析、释义

The smoke from the factory's chimneys can be seen from miles away.
老远就能看见从工厂的烟囱冒出的烟。


If you break a glass, be careful when picking up the pieces!
如果你打碎了玻璃杯，捡起碎片的时候要小心！


Britain used to be the most powerful country in the world.
英国曾是这个世界上最厉害的国家。


You must be brave to fight dragons.
你一定要足够勇敢来与龙搏斗。

I am a student. My father is a doctor.

我是个学生，我父亲是位医生。

※If you command wisely, you'll be obeyed cheerfully. 倘君指挥有方，人人欣然听命。
※It is conflict and not unquestioning agreement that deeps freedom alive. In a free country there will always be coflicting ideas, and this is a source of strength.——Thomas Jefferson. American president  使自由保持活力是冲突而不是绝对的一致。在一个自由的国家里总会有各种相冲突的思想，而这正是力量的源泉。美国总统杰斐逊 .T.  
※Knowledge will not be aquired without pain and application. 不花力气，不下功夫是得不到知识的。
※Some books are to be tasted, others to be swallowed, and some few to be chewed and digested. 有些书只要浏览一下，有些书要仔细阅读，有些书要领会和消化。