A friend who taught me right from wrong, And weak from strong.

这个朋友教我明辨是非， 从善去恶。

youdao

A receiver and amplifier receive the radio waves from the sub reflector, and make these weak radio waves strong enough to be recorded and turned into electronic signals.

接收器和放大器接收来自副反射器的无线电波，并使这些微弱的无线电波强大到足以被记录下来并转化成电子信号。

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He appears to be strong and healthy, but, as a matter of fact, he suffers from a very weak heart.

他看上去强健，其实他的心脏很衰弱。

《新英汉大辞典》

But one of the concerns is weak exports from a strong dollar and weak overseas economies will hurt U.S. growth further.

FORBES: Magazine Article

So a club winning 100 games in a relatively balanced season--one in which many clubs hover close to 0.500--scores better than a 100-win team from a season with more disparity between weak and strong.

FORBES: Magazine Article

Although a strong pound and weak euro may have encouraged Ryton to keep importing parts from outside, the practice sets it apart from most other volume carmakers in Britain.

ECONOMIST: Another car plant dies; long live British carmaking