1.attempt to 尝试，企图
These books attempt to explain why that is, and what, if anything, should be done about it.
这些书试图解释为什么会那样，如果能做的话应该做什么。
“We shall attempt to answer it in this book, ” he wrote.
“我们将试图在这本书中回答这个问题”，他说道。
2.catch up with 赶上，追上；逮捕
We'll do our best to catch up with the advanced world levels.
我们将努力赶上世界先进水平。
They should take some crash courses to catch up with their classmates.
他们应该参加一些速成课程来赶上他们的同学。
3.at most 至多
At most, you might ask why?
最多，你可能会问为什么？
I do it for maybe an hour at most.
我或许在沙滩上最多呆一个钟头。
4.focus on 集中于
Focus on who you want to be and how you want to feel.
把精力集中在你想成为谁和你想要何种感觉上
Next, we turn from the disk subsystem to focus on the processors.
接下来，我们要将焦点从磁盘子系统转移到处理器上。
