A dum-dum is a kind of bullet made so that it does not stay neat when it hits a body. The front is soft, or it is built to open, so the metal spreads or breaks into pieces. That makes a much bigger, messier wound than a smooth, hard bullet that goes in small and may even pass through.

A dum-dum is達姆彈是a kind of bullet made so that it does not stay neat when it hits a body一種設計成打到身體時不會保持完整的子彈。The front is soft, or it is built to open彈頭前端很軟，或設計成會裂開so the metal spreads or breaks into pieces讓金屬散開或碎成好幾片。than a smooth, hard bullet that goes in small and may even pass through比起打進去的洞很小、甚至可能直接穿過去的光滑堅硬子彈That makes a much bigger, messier wound這樣造成的傷口更大、更亂。

People also call this an expanding bullet or a hollow-point; dum-dum is the older, slightly newspaper-ish name.

People also call this an expanding bullet or a hollow-point這種子彈也被稱作expanding bullet（膨脹彈）或hollow-point（空尖彈）dum-dum is the older, slightly newspaper-ish namedum-dum則是比較舊、帶點新聞用語味道的說法。

Though actually, soldiers and lawyers are picky here: in international war, this kind of bullet has been banned for a long time, because it is meant to wreck flesh, not just stop a person. Police in some countries still use expanding bullets on the street, with a different argument — they want the bullet to stay in the body so it does not fly on and hit someone else.

Though actually不過其實soldiers and lawyers are picky here軍方和法律界在這點上很講究in international war在國際戰爭中this kind of bullet has been banned for a long time這種子彈早就被禁用了because it is meant to wreck flesh, not just stop a person因為它的目的是摧毀血肉，而不只是讓人失去戰鬥力。Police in some countries still use expanding bullets on the street有些國家的警察在街頭仍然使用膨脹彈with a different argument理由不太一樣they want the bullet to stay in the body他們希望子彈留在身體裡so it does not fly on and hit someone else這樣才不會穿出去打到別人。

The name is not from the English word dumb. It comes from Dum Dum, a place near Kolkata in India, where a British arsenal made this type of bullet.

The name is not from這個名字的來源不是the English word dumb英文的dumb（笨）這個字。It comes from Dum Dum它來自Dum Dum（杜姆杜姆）a place near Kolkata in India印度加爾各答附近的一個地方where a British arsenal made this type of bullet英國的一座兵工廠在那裡製造這種子彈。

You will meet it in history, news about weapons, and crime stories. It is not everyday talk.

in history, news about weapons, and crime stories在歷史、武器新聞和犯罪報導裡you will meet it你會遇到這個字。It is not它不是everyday talk日常生活會用的話。