Although chewing celery might seem like a strenuous activity, it burns about the same amount of calories as watching grass grow.
嚼芹菜，虽然看起来好像是一件费劲的事情，但其消耗的热量与什么也不做所消耗的能量相比，几乎一样。
Richard Long's A Line Made By Walking, however, involved nothing more strenuous than a 20-minute train ride from Waterloo.
然而，理查德·朗的《行走的路线》并不比从滑铁卢坐20分钟火车更费力。
I can concede that a player's mental attitude can be the deciding factor in an event, for instance, a marathon running or even a less strenuous game such as chess.
我承认，一个运动员的心态可能是一个赛事的决定因素，如马拉松赛跑，或甚至是一个不那么激烈的比赛，如国际象棋。
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