重点讲解：
1. on Earth
（用于包含形容词最高级的名词短语后表示强调）世界上，人世间；
eg. In former times there were far fewer people dwelling on earth than there are now.
从前生活在地球上的人比今天少得多。
eg. I'm fond of you than anybody else on earth.
我喜欢你，胜过世界上任何一个人。
2. waste no time in doing sth.
立即；马上做某事；
eg. Tom wasted no time in telling me why he had come.
汤姆马上告诉了我他来的原因。
eg. Then we should waste no time learning how to beat the drum.
那我们就赶紧学打鼓去吧。
3. be made up of
（由…）构成的；（由…）制成的；
eg. The commission is made up of five people, including two women.
委员会由五人组成，其中包括两名妇女。
eg. This collection is made up of three parts: poems, essays and short stories.
这本集子是由诗 、散文和短篇小说三部分组合而成。