Structural fire precaution against smoke district and building structure;
建筑防火防烟分区和建筑构造；
Equipment is always carefully sterilized as a precaution against infection.
仪器设备总是经过仔细消毒以防感染。
Equipment tis always carefully sterilized as a precaution against infection.
仪器设备总是经过仔细消毒以防感染。
They took heavy coats as a precaution against the possibility of cold weather.
他们携带厚重的外套，以预防冷天来袭。
They took heavy coats as a precaution against the possibility of cold weather.
他们携带厚重的外套，以预防冷天来袭。
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