皇室继承人威尔士亲王在进行几个简单的动作后丢掉了他的“能量球”，这令他忍俊不禁。
The heir to the throne dropped his "energy ball" while performing simple moves that had the royal in stitches.
你需要几个简单的动作而已。
在实验中，研究者让志愿者做了几个简单的动作。
In the experiments, the researchers had volunteers perform several simple actions.
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