Translation of "Fewer" in Chinese

No fewer than 50 passengers were killed.

不下50个乘客死了。

Instead of fewer accidents there are more.

事故沒減少而增加。

No fewer than five hundred students were present.

出席的學生不下五百人。

However, there are fewer people learning Chinese, so I think Chinese people are not too familiar with the foreign accents and mistakes.

但是，学习中文的人比较少，所以我认为有的中国人不太习惯外国人的口音和错误。