The center of mass is lower, around half of the machine height.
该中心的质量较低，大约一半的机器的高度。
The tiny hamlet was enclosed by walls about half a man's height.
这个小村庄周围筑有半人高的围墙。
Put simply, your waist should be less than half your height.
不过简单点说，就是你的腰围不应超过你的身高。
Put simply, your waist should be less than half your height.
不过简单点说，就是你的腰围不应超过你的身高。
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