重点讲解：
1. keep on doing sth.
继续做某事；反复做某事；
eg. My wife keeps on saying that I work too hard.
我妻子总说我工作太辛苦了。
eg. To know it's no use , but keep on doing it -- there can be no greater folly than this.
知其不可而为之,愚不可及也.
2. go by
（时间）流逝，过去；遵循；遵照；
eg. My grandmother was becoming more and more sad and frail as the years went by.
随着时间的流逝，我的祖母变得日益伤感和虚弱。
eg. If they prove that I was wrong, then I'll go by what they say.
如果他们能证明我不对，我就听他们的。
3. get together
开会；聚会；
eg. This is the only forum where East and West can get together.
这是东西方可以聚首的唯一论坛。
eg. Let's get together and talk it over.
大家聚在一起商量商量。