Attach a sharp stone to the end of astout piece of wood, and with this lever you can hugely increase thespeed, force, effectiveness and safety with which the axe can bewielded.
将一块带有尖刃的石器和一根强壮的树枝接在一起，利用这根长矛人类可以极大地提高速度、力度、效率和安全性。
Beer and sharp axes don't really go well together, but Hudson says safety is their top priority.
啤酒和锋利的斧头其实并不能友好相处，但是哈德森说安全是第一位的。
Wear safety shoes to prevent foot injuries that can be caused by falling objects or sharp metals.
防止足部被掉落物件或尖锐金属等所伤，应穿安全鞋。
Dormitory safety becomes even more of an issue on the verge of graduation season, so students had better stay sharp.
临近毕业季，寝室安全问题变得尤为突出，所以同学们最好保持警惕。
In order to protect your safety, you should have sharp eyes while driving.
开车时要眼观六路，才能保障自身安全。
In order to protect your safety, you should have sharp eyes while driving.
开车时要眼观六路，才能保障自身安全。
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