重點講解：
1. at first 最初；起初；開始時；
例句：At first, he seemed surprised by my questions.
起初，他似乎對我的問題感到驚訝nH3NTivff2Z&y。
2. go by （時間）流逝，過去；
例句：My grandmother was becoming more and more sad and frail as the years went by.
隨著時間的流逝，我的祖母變得日益傷感和虛弱pml(Qvm-jxN;sL。
3. look back 追憶；回顧；
例句：She can look back on her career with great satisfaction.
她回顧自己的經歷覺得心滿意足](gz]#9afopg5cPBC_Xq。
4. as a whole 整體而言；總體上；
例句：As a whole, this article is well written.
總的說來，這篇文章寫得很好0NDs18qsSjkHzTzj。
5. keep up with 跟上（活兒、人等）；同…做（或理解）得一樣好；
例句：He made an arduous effort to keep up with the rest of the class.
他努力跟上班上其他同學Ky7[Pa3kMEdq^Vzyf@。