| 例句 |
The wearing of a crash helmet is required by law.法律要求必须佩戴安全帽。Hard hats provide protection for the workers' heads.安全帽保护工人的头部。Building workers risk injury by not wearing helmets.建筑工人不戴安全帽便有受伤的危险。Hard hats must be worn on the construction site.在建筑工地必须戴安全帽。Hard hats must be worn on site.在工地上必须戴安全帽。 |