当非洲产毒蛇感觉的时候威胁它将会从地面抬起它的前面和头大约3 - 4尺，打开它的口，传布一个平坦的垂兜，而且摇头。
When the mamba feels threatened it will raise its front and head about 3-4 feet off the ground, open its mouth, spread a flat hood, and shake its head.
该系列落地风扇和传统风扇一样可以摇头，而且还可以上下任意调整高度。
This new line of floor fans offer oscillation like traditional fans, but can also be adjusted up and down to any height.
亲爱的朋友，现在你一直在摇头，而且一部分的你在摇头说：“阁下，到底发生什么事了？”
Now you, dear friend, have been shaking your head and part of you is shaking your head saying, "Lord, what is going on?"
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