开车一定要小心，尤其是在夜间。

Drive carefully, especially at night.

youdao

你一定要小心开车。

You must be careful when you drive.

youdao

开车时一定要时刻小心。

Susan: You should always be careful when you drive.

youdao

今晚预报有雷暴雨，你路上一定要小心开车。

According to the weather report, there is thunderstorm tonight. Take care while driving on the road.

youdao

今晚预报有雷暴雨，你路上一定要小心开车。

According to the weather report, there is thunderstorm tonight. Take care while driving on the road.

youdao