Coming out of the final bend, the runner stepped up agear to overtake the rest of the pack.
赛跑者绕过最后一个弯道后开始加速，以图超越同组的其他选手。
《牛津词典》
2
He had always had a good memory, but the thrill of young love seems to have shifted agear in his mind: from now on, he would start recording his whole life in detail.
他的记性一向很好，但稚嫩爱情带来的刺激，似乎转变了他的思想：从现在起，他要开始详细地记录他的一生。
3
The sovereign-debt crisis in the euro zone stepped up agear.