That makes one want to eat; extremely delicious.

　　令人垂涎的'；誘人食欲的；美味的。

　　I want you to be extremely quiet, because this is no joke.

　　我希望你們絕對安靜，因為這不是開玩笑。

　　It's still extremely difficult to get tenure.

　　要取得終身職位仍然極其困難。

　　It's a useful introduction to an extremely complex subject.

　　這是對一門極為復(fù)雜的學(xué)科的有益入門教程。

　　Operation of the device is extremely simple.

　　這個裝置的操作非常簡單。