如果你看到一个像四个呼啦圈连在一起的东西在天上飞，可别想当然地以为它是UFO。
If you see something that looks like four hula hoops attached together hovering in the sky, don't automatically assume that it's a UFO.
在第一圈的第四个弯道罗斯伯格超过了我。
I lost ground at turn four on the first lap, and [Nico] Rosberg got past me.
发动机的一个工作循环分布在活塞的四个行程中，一个完整的工作循环曲轴需要转动两圈。
The cycle of operations is spread over four piston strokes. To complete the full cycle it takes two revolutions of the crankshaft.
每个问题有四个选择项，受试者必须圈出他们在录音中所听到的单词。
The subjects had to circle the word they had heard in the recording. Some of the questions had four choices that sound alike.
每个问题有四个选择项，受试者必须圈出他们在录音中所听到的单词。
The subjects had to circle the word they had heard in the recording. Some of the questions had four choices that sound alike.
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