Snow removal becomes a major expense for northern cities.
雪成了北方城市的主要开支之一。
Additional operations include ice control and snow removal.
其他的操作包括冰雪的控制和清除。
Difficult physical activity during snow removal can cause a heart attack.
在清除积雪时的艰苦体力活动可能造成心脏病发作。
The timely removal of stagnant water and snow ;
及时清扫积水和积雪；
The timely removal of stagnant water and snow ;
及时清扫积水和积雪；
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