USMC is short for the United States Marine Corps — one of the branches of the American armed forces. The Marines are trained to fight on land and from ships at sea, and they are often the first troops sent into a dangerous place, so Americans think of them as tough and proud.

USMC is short forUSMC 是...的縮寫 the United States Marine Corps美國海軍陸戰隊——one of the branches of the American armed forces美軍軍種之一。The Marines are trained to fight on land and from ships at sea海軍陸戰隊受訓能在陸地上作戰，也能從海上的船艦出擊，and they are often the first troops sent into a dangerous place而且常常是最先被派到危險地方的部隊，so Americans think of them as tough and proud所以美國人認為他們強悍又自豪。

You see 'USMC' written on uniforms, caps, trucks, and signs rather than said out loud; when people speak, they say 'the Marines' or 'the Marine Corps', and each letter is said on its own (U-S-M-C), never as one word. Note the spelling of 'Corps': it looks like 'corpse' but the p and s are silent, so it sounds like 'core'.

You see 'USMC' written你會看到 'USMC' 這幾個字寫 on uniforms, caps, trucks, and signs在制服、帽子、卡車、標誌上，rather than said out loud而不是用講的；when people speak人們講話的時候，they say 'the Marines' or 'the Marine Corps'會說 'the Marines' 或 'the Marine Corps'，and each letter is said on its own (U-S-M-C)而且每個字母是分開唸的（U-S-M-C），never as one word絕不會唸成一個字。Note the spelling of 'Corps'注意 'Corps' 這個字的拼法：it looks like 'corpse'它看起來像 'corpse'（屍體），but the p and s are silent但 p 和 s 不發音，so it sounds like 'core'所以聽起來像 'core'。

A person in it is 'a Marine', with a capital M — and Marines care about that capital letter. Outside the US military world this abbreviation is rare, so in normal writing it is kinder to your reader to write the full name once first.

A person in it is 'a Marine'裡面的一個人叫做 'a Marine'，with a capital M要用大寫的 M——and Marines care about that capital letter而且 Marines 很在乎這個大寫。Outside the US military world在美國軍隊世界之外 this abbreviation is rare這個縮寫很少見，so in normal writing所以在一般寫作中，to write the full name once first先把全名完整寫一次 it is kinder to your reader對讀者比較友善。