1、The car's left trafficator wasn't working, so it made it difficult for other drivers to know which way it was turning.
这辆车的左转向器坏了,这让其他司机很难知道它要往哪个方向转。
2、The trafficator on the bike helps to indicate which way the rider intends to turn.
自行车上的手示灯帮助骑手指示他打算向哪个方向转。