Smoke detectors must be installed to comply with fire regulations. 遵照消防条例必须安装烟雾探测器。
building/safety/environmental regulations 建筑/安全/环境条例
Before rules and regulations were introduced, the sport was very dangerous. 在没有制定规则之前,这项体育运动十分危险。
a doctor's regulation white coat 医生惯常穿的白大褂
noun¹
noun²
usuallyregulations
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