他的讲课涉及到语言诸方面的问题。 His lecture covered various aspects of language.
这些年轻人中很多人理论上知道怎么干，但要付诸实践时仍然是幼稚无知的。 Many of these youngsters know the job in theory but they’re still wet behind the ears when it comes to putting it into practice.
三个臭皮匠，赛过诸葛亮。 Many heads are better than one.
他遭诸多不幸而一蹶不振。 Various strokes of misfortune led to his ruin.
