懈怠

slacked off───偷懒；懈怠

slacken off───松劲

slackened off───松劲

slackens off───松劲

blacked out───v.中断，停止；熄灭灯火；晕倒，昏厥

blocked off───阻挡；封堵

clocked off───打卡以记录下班时间

The American artillery slacked off in its firing and this tactical error undoubtedly allowed a lot of fleeing troops to fight their way out.───美国炮兵火力减弱，这一策略性错误无疑使大批逃窜的敌军得以突围。

At last, one over-stretched chord of her agony slacked.───最后，她那过分紧张痛苦心弦松弛下来了。

lime and slacked lime have different results to excite the activity of fly ash.───生石灰和熟石灰对粉煤灰活性激发的效果是不同的。