straightforward

The assembly of this bookshelf is straightforward and should take less than twenty minutes.

(Chinese) 这个书架的组装非常简单，应该不到二十分钟就能完成。

He gave me a straightforward answer without trying to hide any of the unpleasant facts.

(Chinese) 他给了我一个直截了当的回答，没有试图隐瞒任何令人不快的事实。