I still have no reason to doubt his word.

　　我還是沒有理由懷疑他的話。

　　There is no reason why love shouldn't cross the age barrier

　　愛沒有理由不能跨越年齡的阻礙。

　　There is no reason for people to get their hopes up over this mission

　　不必對這次行動(dòng)抱太大希望。