Everybody is aware of the hazards of smoking.

大家都明白吸烟的危害。

It protects against environmental hazards such as wind and sun.

它防范诸如狂风和烈日等环境危害。

We perfected a hand-signal system so that he could keep me informed of hazards.

我们完善了一套手语体系，以便他能告知我危险。

Do you want your child walking on the streets or in the park barefoot, where there might be dog poo, dirt and possible hazards like glass?

你想让孩子们赤脚走在满是狗屎、灰尘和碎玻璃的街上或公园里吗？

It is, therefore, essential that a banksman be appointed to warn the operator of hazards that cannot be seen from the operator's position.

重型运土设备使用时，操作人员只能看到有限的区域，因此，必须指派矿口监工随时警告操作人员在操作位置上无法发现的危险。