You must wear goggles and a mask that will protect you against the fumes
为了免受烟雾危害,你必须戴上护目镜和面罩。
She bent down to pick up her glove.
她俯身去捡手套。
It is compulsory for all motorcyclists to wear helmets.
所有骑摩托车的人都必须戴头盔,这是强制性的。 Helmets can give cyclists a false sense of security.
头盔能给骑自行车的人一种虚假的安全感。