You'd better lock the door for safety's sake.

为安全起见，你最好把门锁上。

youdao

For safety's sake, don't drive more than 30 kilometers per hour in the city.

为了安全起见，在市内开车时速不要超过三十公里。

youdao

If you're using a heating pad, for safety's sake, be careful not to fall asleep with that electric pad nestled against your ear.

如果你用加热垫，为了安全，小心不要在电热垫靠着你耳朵时睡着了。

youdao

Modern solar collectors can concentrate only so much energy for safety's sake: too much in one place and they risk cooking themselves.

ENGADGET