弗格森爵士为奥贝坦没能进球而遗憾，但依然相信他能释放毋庸质疑的潜力潜力证明自己的价值。
Sir Alex Ferguson felt for his latest debutant after his failure to score, but he remains confident that Obertan will go on to prove his worth and realise his undoubted potential.
毋庸质疑的是地球正在变暖，但关于它变暖的原因是由于人类活动所致还是一种自然现象还存在激烈的争论。
There is no doubt that the earth is becoming warmer but there is fierce debate over whether it is human activity that has caused this global warming or whether it is just a natural phenomenon.
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