Sound travels slower than light.

Sound waves will not travel through a vacuum.

声波在真空里不能传播.

He found what he was saying was not proper for the occasion and he stopped short.

他觉得自己说的话不对碴儿,就停住了.

I could hear the sound of his ragged breathing.

我能够听到他那急促的呼吸声。

the sound of footsteps on the stairs

楼梯上的脚步声

I'm afraid this isn't the proper way to handle the case.

这样处理,恐怕不妥.

This is not the proper way.

这种方法不妥.

the National Sound Archive

国家音响档案馆

The book hardly belongs to literature proper.

这本书不好说是纯文学书.

The rights of citizens must not be abridged without proper cause.

没有正当理由,不能擅自剥夺公民的权利.

This formulation is not proper.

这种提法不妥.

Put the instruments in their proper places.

把仪器安放好.

I don't like proper children.

我不喜欢一本正经的孩子.

Do as you think proper.

你认为怎么妥当就怎么办.

To be rude to the old is not proper.

对老人粗鲁是不适当的.

After a very proper upbringing he chose to lead the Bohemian life of an artist.

他受过正统的教育,却立意过着艺术家我行我素的生活.

Don't fling your arms and legs around like that. Make the proper swimming strokes.

别这样乱划乱蹬,要采用正确的游泳姿势.

Proper clothing also helps to keep you cool.

适当的衣服也能使你感到凉快.

In those days it was not thought entirely proper for a woman to be on the stage.

那个时候，女性登台表演被认为不太得体。

The offender made proper restitution to the victim's kindred.

违法者对受害人亲属给予了适当的补偿。

There were no proper toilets, but only an outdoor latrine.

没有正规的厕所，只有一个位于室外的茅坑。