We all know you're capable of it.你的本事有多大，我们都清楚
capable of能够
He is capable of great villainies.
他能干出极坏的事情。
Only human beings are capable of speech.
只有人类才具有说话的能力。

I read your profile in "The new yorker" a couple of days ago, about the D.C. Sniper.我前些日子 还在《纽约客》上看到你关于华府惊魂23天事件的文章
a couple of days一两天, 几天
I'll be back in a couple of days.
我过几天就回来。
The revolt was suppressed in a couple of days.
叛乱在几天之内就被镇压下去了。

I think I might be needing something with a little more purpose.我想我得来点有用的东西
a little more稍多的
I'll thank you to be a little more polite.
你稍稍客气一点好不好？
Let me sketch in a little more of our plans.
让我把我们的计划再稍加补充。