The book tries to give simple explanations of some very complex scientific ideas. 该书试图对一些非常复杂的科学概念作出简单的解释。

It's a good idea, but implementing it won't be as simple as you think. 这想法不错，但实施起来就没有你想的那么容易。

The machine is fairly simple to operate. 该机器很容易操作。

All you have to do is press the button. It's that simple. 你要做的只是按一下这个按钮，就这么简单。

Ben used to live in a simple cabin in the woods. 本曾经住在林中一个简易的小木屋里。

a simple meal 便餐

The simple fact is that he wants a divorce. 事实就是他想离婚。

The country has no navy for the simple reason that it has no sea. 这个国家没有海军，纯粹是因为该国没有海域。

By issuing simple voice commands, you can get the computer to perform most functions. 通过发出简单的语音指令，你就可以使计算机执行大多数的功能。