He is certain to succeed in doing his experiment.

他做试验一定会成功.

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He is sure to succeed in doing the experiment.

他一定能实验成功.

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Only those that succeed in doing get the attention of other agents.

只有胜出者才得到其他经纪人的重视和响应.

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Only by working hard can we succeed in doing everything.

只有努力,才能成功.

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