安全帽的英文：
crash helment

參考例句：
  • Safety helmets must be worn on this site
    此工地必須戴安全帽。
  • Protective helmets must be worn on site.
    進入工地必須戴上安全帽。
  • Wear your safety helmet when you go down. Don't take any risks
    戴上安全帽再下去，不要冒險。
  • Both men were wearing hard hats and protective ear pads.
    兩人都戴著安全帽和護耳墊。
  • Sometimes I ride my motorcycle without my helmet on.
    我有時候騎機車沒有戴安全帽。
  • Helmets were dished out before the miners went underground
    下井之前，給礦工們分發(fā)了安全帽。
crash是什么意思：
n. 墜落；撞車；崩潰，垮臺；系統(tǒng)崩潰
v. 突然倒下；碰撞；系統(tǒng)崩潰；破產(chǎn)，崩潰
adj. 速成的
adv. 嘩啦一聲地
  • Their car crashed into a guardrail. The airplane crashed over the ocean.
    他們的車撞上護欄.飛機在海洋上墜毀.
  • A car crash into a big tree.
    一輛小汽車撞到了一棵大樹上。
  • My computer crashed yesterday.
    我的電腦昨天死機了。
  • He crashed into a stationary bus.
    他撞了一輛停著不動的公共汽車。
  • The airplane crashed into the house.
    那架飛機轟隆一聲撞上房子。
helment是什么意思：
n.盔,鋼盔

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