After hours of digging, we began to slacken up a little.
我们挖了数小时后, 速度慢了下来.
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Don't slacken up our efforts when victory is in sight.
胜利在望,我们不能松劲.
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Slacken up before you reach the turn.
到拐弯处减速.
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Slacken up the tent ropes before it rains.
下雨之前放松帐篷的绳索.
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