Big jobs usually go to the men who prove their ability to outgrow small ones.

大事往往赋予那些能证明自己具有超越做小事的能力的人。

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It is expected that teachers will have to prove their ability in eight areas - but the most contentious is reported to be the measurement of pupils' improvement.

BBC: Pay dispute over pupil improvement

The individual soldier, sailor, Marine, airman prove their own ability, and we've have women, particularly in the medical field, that have done these various things.

NPR: Women in Combat: Rules and Reality

These emerging solutions will have to prove to the industry their ability to scale over time.

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