研究人员训练了11条狗，让它们在扫描其大脑图像时保持完全静止。
Researchers trained 11 dogs to stay completely still while images were taken of their brains.
直升机停止上升后，机体需保持完全静止不动，不可有任何的垂直上升或下降，机体不可左右摇晃或漂移。
Come to a complete stop without any vertical bounce or dip, and little to no lateral wobble or drifting.
你还不得不让光量子或电子保持静止，这又是另一个完全不同的难题。
You also have to make the photon or electron sit still, another problem entirely.
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