Rather than kick up and down, try to snap your feet down and inward.
不要上下打腿，而是尝试同时向下向内打腿。
Dancers have to be very fit because they jump very high and kick their legs up and down.
舞者必须非常健康，因为他们需要跳得很高，并上下踢腿。
For my own amusement, I shuffle them up and down the top-five hierarchy, and sometimes kick one out for a new friend, only to have to put them back in when I remember that you can't make old friends.
作为我自己的消遣习惯，我会经常将他们前五名的顺序上下打乱，偶尔还会为了新交上的朋友而不得不将他们之中的某个踢出，之后却又将他们安插回来，因为我知道我是永远不会交上老朋友的。
Bacteria in our gut gobble up things like sugars and fatty acids, which they can break down either through respiration or fermentation. Respiration provides a bigger energy kick.
我们内脏里的细菌会吞噬糖类和脂肪酸一类的物质，它们通过呼吸作用和发酵作用可以分解此类物质。
This kiss-up and kick-down type of attitude has been the most unbearable thing for the Chinese, being the cultural mentors for Korea through out of the history, to accept.
这种狐假虎威狗仗人势的做派也是历史上作为其文化宗主国的中国人最不能容忍的。
Then, kick your legs up and down together in a whipping motion generating from the hips and bending at the knees, as if you were a dolphin.
通过髋关节和膝关节用力运动，上下踢你的腿，就像海豚一样。
Then, kick your legs up and down together in a whipping motion generating from the hips and bending at the knees, as if you were a dolphin.
通过髋关节和膝关节用力运动，上下踢你的腿，就像海豚一样。
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