It's going to be tough, but these guys learn quickly.
这会很难，但是这些家伙们学得很快。
《柯林斯英汉双解大词典》
2
If you believe that only toughguys commit crimes, you may have to think again.
假如你认为只有粗野的家伙才会犯罪，你可能需要再考虑一下。
3
And, if it is right, this study also confirms a lesson learned by generations of bar-room toughguys and schoolyard bullies: if you want attention, get angry.