n.頭盔；安全帽

The sword bit the knight's helmet. 劍刺穿了武士的頭盔。

A miner's lamp is fixed onto his helmet. 礦燈固定在礦工的頭盔上。

The safety helmet is held on by an elastic strap. 安全帽用一根松緊帶系住。

All visitors to the site must wear safety helmet. 到工地的所有參觀者必須帶上安全帽。