他们的笑话似乎足够无害。

Their jokes seemed ___harmless enough.

彼得可能看起来有点凶，但实际上他相当无害。

Peter might look a bit fierce, but actually he's fairly ___harmless.

他看起来足够无害，所以我决定小睡一会儿。

He seemed ___harmless enough, so I decided to take a nap.