experience名词形式可数吗

例句：

She exercises two or three times a week.

她一周锻炼两三次。

Let's start off with some gentle exercises.

我们先来做点强度小的'练习。

These exercises will help to keep you supple.

这些锻炼项目有助于你保持身体的柔韧性。

It is important never to overdo new exercises.

重要的是，千万不要过度进行一项新的锻炼。