重点讲解：
1. be known as 称为；叫做；
The drug is commonly known as Ecstasy.
这种药通常称作摇头丸x=D+VV7gLjaIR5。
2. come from 来自；始于；
Try to buy wood that you know has come from a sustainable source.
尽量购买来自可持续发展林的木材WBH7zYc0z|r,njomZ。
3. compared to 与…相比；和…比起来；
Compared to people living only a few generations ago, we have greater opportunities to have a good time.
比起上几辈人，我们有更多机会享受生活;6Kdc+WY18%Dg。
4. attach to 缚上；系上；贴上；
We attach labels to things before we file them away.
存档前，我们先贴上标签)rS)1[m-h#DA9oiE。