The skilful operation of a computer is hard to learn.
学会熟练地操作电脑是不容易习得。
The skilful operation of a computer is hard to learn.
学会熟练地操作电脑是不容易习得。
His landing was awkward,but it was only the second time he’d flown solo.
陆技术很不熟练,但这只是第二次单。
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