可以看到，每隔一行都有一个灰色背景，这就提高了可读性。

As you can see, every other line has a gray background, which improves readability.

youdao

可以看到，每隔一行都有一个灰色背景，这就提高了可读性。

As you can see, every other line has a gray background, which improves readability.

youdao