树枝划着车辆的尖锐声如同指甲划过黑板时的声音。
The branches screeched along the side of the bus like fingernails running down a blackboard.
通常地，噪音的增加或工蜂发出尖锐声，被蜜蜂用作离开蜂巢的信号。
Normally, an increase in noise, or "worker piping, " is used as a signal for bees to leave their hives.
通常地，噪音的增加或工蜂发出尖锐声，被蜜蜂用作离开蜂巢的信号。
Normally, an increase in noise, or "worker piping," is used as a signal for bees to leave their hives.
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