Action is equal to reaction, but it ACTS in a contrary direction.

作用与反作用相等，但它在相反的方向起作用。

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Example 4:Action is equal to reaction, but it acts in a contrary direction.

作用与反作用力大小相等，方向相反。

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Example 4:Action is equal to reaction, but it acts in a contrary direction.

作用与反作用力大小相等，方向相反。

youdao