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1·Increasing your activity level will give you useful things.

提高你的活动水平会给你带来有用的东西。

2·Their yawning seems to have nothing to do with sleepiness or boredom—quite the reverse—but it does precede a change in activity level.

他们打哈欠似乎与困倦或者无聊没有任何关系，但恰恰相反，打哈欠这一行为的确出现在了活动水平的变化之前。

3·The empirical evidence, such as it is, suggests an altogether different function for yawning—namely, that yawning prepares us for a change in activity level.

很多实验证据证实了打哈欠的另一个不同的功能，它能让我们做好准备，改变活动状态。

4·Increasing your activity level will be good for you.

提高你的活动水平对你有好处。

5·Press Tab to indent in to the activity level.

按tab键将其缩进到活动级。

6·Moderate activity level would be between 99-126 beats per minute.

一般的心率水平应该在每分钟99 - 126之间。

7·Strenuous activity level would be between 126-153 beats per minute.

较好的心率水平应该在每分钟126 - 153之间。

8·Enter for a new line, then press Tab to indent in to the activity level.

另起一行，然后按tab键来将其缩进到活动级。

9·The child's activity level interferes only slightly with his ORR her performance.

孩子的活动量对他的表现产生轻微的妨碍。

10·This is an expensive operation, but at least it can be automated at the activity level.

这种操作代价会比较高，但至少在活动层可以自动执行。