There are a total of three, power/lock (one button) and up/down volume (two buttons).
共有三个，开机/锁定(一个键)、上/下（两个键）。
Grab three-pound weights or two soup cans and do one minute each of lifting for your triceps (put your hands behind your head, with your elbows at your ears and lift the weight up and down).
手握三磅重的东西或者2个汤罐头，锻炼双臂肱三头肌，（把手放置于后头，手肘靠近耳朵，上下举起负重）。
In the last two years I've 10 scaled walls higher than this building, ran up and down 11 rubble piles higher than three of my vans piled atop one another.
过去两年里，我攀越过比这栋建筑更高的墙，还经常在比三辆我的面包车垒起来的高度还要高的石堆上冲上冲下。
The application of three-down-two-up and inclined to Y type ventilation in work surface 2301, 3302, 3301 of Sihe mine has got good effects and the up corner gas is under control.
结合寺河矿2301、3302、 3301工作面应用三进两回偏Y型通风方式，取得良好效果，上隅角瓦斯始终处于受控状态。
I walked up and down for two or three minutes, then I said: "Henry, go back to these men."
我来来回回徘徊了二三分钟，说：“亨利，回到那些人那里去。”
I walked up and down for two or three minutes, then I said: "Henry, go back to these men."
我来来回回徘徊了二三分钟，说：“亨利，回到那些人那里去。”
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