It's only sound if it's a valid argument and it has true premises.

如果是有效论点才会完好，他有真前提。

youdao

A good deductive argument is sound if and only if it's both valid and has true premises.

一个好的演绎论点是完好的，如果且仅如果这些都有效，并且前提为真。

youdao

They have a sound if unusual marketing strategy in which logistics plays an important role.

在市场战略中，非凡的物流使他们名声大噪。

youdao

As a boy,Carl said he knew if it was time to go to school by the sound of a train.

VOA: special.2009.11.01

And,again,to us in the modern world, if you didn't already have some exposure to religious narratives like this,that would sound odd.

同样的，对现代人来说，如果没接触过这类宗教描述,可能会觉得奇怪。

耶鲁公开课 - 新约课程节选

And now, if I'm touching mouse pointer, we saw that Boolean expression before, play sound meow, wait a couple of seconds, and then just keep checking.

现在，如果我们碰下鼠标指针，起初我们看到一个布尔表达式，播放猫叫的声音，等几秒钟，然后如刚才那样做检测。

哈佛公开课 - 计算机科学课程节选

The collar emits a warning sound if the cat or dog gets too close.

BBC: Monima O'Connor, Russell George and William Powell

Websites have sprung up to cater to the "lolcat community", and members have even developed their own language: an approximation of how cats might sound if they spoke, according to those in the know.

BBC: Lolcat art: Gallery hosts exhibition of cat phenomenon

This is a sound if not fresh-faced bunch.

ECONOMIST: The right in Germany