Examples

He must needs obey.

他必须服从。

We must needs by objective.

客观上讲，我们很需要。

we must needs go

We must learn to separate our needs from our wants.

我们必须学会将我们的需要和欲望分开。

We must make certain that the users' needs are met.

我们必须确保用户的需求得到满足。

we will go, if needs must

骈文的写作需要很多技巧，比如一定要讲究对偶。

Writing parallel prose needs a lot of technique; for example, you must pay attention to antithesis.