一只训练有素的狗更自信，给它更多的自由时间会比未经训练的狗更安全。

A well-trained dog is more confident and can more safely be allowed a greater amount of freedom than an untrained one.

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这意味着宇航员需要花更多时间训练维修设备故障，梅尔·罗伊说到。

That means astronauts may have to spend more time training for equipment failures, Melroy says.

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但从去年开始我决定为人生第一次马拉松比赛进行训练，所以我决定每天要早起去跑步，这样才能给家人留下更多时间。

But last year, when I decided to train for my first marathon, I decided that I needed to start running in the mornings if I was to have any time left for my family.

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