We need to apply force on tools when we are using them.

当我们使用工具时我们要在上面施力.

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Do we need to apply force on a tool when use it? Why?

当我们使作工具时需要在上面施力 吗 ?为什么?

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Strength - The ability of a muscular unit, or combination of muscular apply force.

力气 - 肌肉单位的能力, 或者肌肉结合能力供给.

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An ax used to apply force to wood.

斧子用来对木头施加力.

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