軍中的那個人
這兩個意思都是核心畫面本身，只是一個講的是做什麼，一個講的是叫什麼階。
noun · C1
The member of a bomber aircraft's crew whose job is to aim the bombs and release them at the right moment. The source marks this use American and Canadian English.
轟炸機投彈手
核心畫面
You can hold this word as one job title: the one who sends the explosive on its way. Not the one who drives, not the one who plans - the one at the moment of release. Every meaning here is that role somewhere different: in the nose of an aircraft, on the rank list of a gun unit, and, as a joke of naming, on a beetle that back.
bombardier 可以想成一個職稱：負責把爆裂的東西送出去的那個人。不是開車開飛機的人，也不是規劃的人，而是按下…更多收起
bombardier 可以想成一個職稱：負責把爆裂的東西送出去的那個人。不是開車開飛機的人，也不是規劃的人，而是按下去的那一刻在場的人。這一頁的每個意思，都可以當成同一個角色換了地方：飛機的機鼻裡、砲兵的階級表上，還有一隻會反擊的甲蟲身上。From the word’s history
The evidence packet derives the word from bombard plus -ier, by way of Italian bombardiere and Middle French bombardier - literally the person who works the bombard, an early cannon.
提供的來源把這個字拆成 bombard 加 -ier，並經由義大利文 bombardiere 和中古法文進入英文。字面就是「操作 bombard（早期火砲）的人」。
Wiktionary entry supplied in this batch's evidence packet (kaikki extract, source_ref kaikki:3f6f69a190036ae4:1155856204): "Partly borrowed from Italian bombardiere... By surface analysis, bombard + -ier."
Two branches
被借去當名字的甲蟲
這是把上面那個角色借給一隻蟲：牠被碰到時會噴出滾燙的液體，還會發出響聲，所以人們就用開砲的人來替牠命名。
noun · C2
A bombardier beetle: a small beetle that defends itself by shooting a hot, bad-smelling spray out of its back end, with a popping sound.
投彈手甲蟲（放屁蟲）