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第三人称复数：crash helmets
1. 安全帽：crash fire 飞机失事火灾 | crash helmet 安全帽 | crash investigation procedure 失事飞机事故调查程序
2. 头盔：crash boat 救生艇 | crash helmet 头盔 | crash into 闯入
3. 防护帽：crampon 冰爪 | crash helmet 防护帽 | gas lamp 煤气灯
4. 头盔, 安全帽：crash door || 防冲门 | crash helmet || 头盔, 安全帽 | crash into || 闯入
1. Massa was struck in the helmet Saturday by a loose piece from another car, causing him to crash into the tire barrier at high speed.
noun
1. a padded helmet worn by people riding bicycles or motorcycles
protects the head in case of accidents