It can exercise muscles you don't use when you walk forward.
它能够锻炼你正着走的时候用不上的肌肉。
This does not mean that you can earn mercy when you exercise mercy.
这不是说如果你实践怜悯，就可以赢得怜悯。
And I feel you then want us to repeat this exercise when ever we can?
我感觉你们随后想我们重复这个练习，无论什么时候？
You can choose when and how to exercise your body.
你可以选择何时如何去锻炼。
Exercise can be a little awkward, especially when you first start.
锻炼可能有点尴尬，特别是当你第一次开始。
You can exercise when you're tired.
在疲劳的时候你能够锻练。
You can exercise when you're tired.
在疲劳的时候你能够锻练。
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