D.C. is short for District of Columbia. It is not a US state. It is a special piece of land set aside to hold the US capital city, Washington.

D.C.D.C. is short for是...的縮寫 District of ColumbiaDistrict of Columbia。It is not它不是 a US state美國的一個州。It is它是 a special piece of land一塊特別的土地, set aside劃出來 to hold用來容納 the US capital city, Washington美國首都華盛頓。

When people write Washington, D.C., they mean that capital, not the state of Washington far away in the north-west — two different places, easy to mix up.

When people write當大家寫 Washington, D.C.Washington, D.C.時, they mean指的是 that capital那個首都, not而不是 the state of Washington far away in the north-west遠在西北邊的華盛頓州 — two different places是兩個不同的地方, easy to mix up很容易搞混。

Americans often just say “D.C.” for the capital area: the government buildings, the city, and the land around it. You will see it on addresses, news, and maps.

Americans美國人 often just say常常直接說 'D.C.'「D.C.」 for the capital area來指整個首都地區: the government buildings, the city, and the land around it政府大樓、這座城市，還有周邊的土地。You will see it你會看到它 on addresses, news, and maps在地址、新聞和地圖上。

Though actually, D.C. by itself can mean other things too (direct current in science; DC Comics). After Washington, or as a place, it means this district.

Though actually不過其實, D.C.D.C. by itself單獨用時 can mean other things too也可能有別的意思 (direct current in science; DC Comics)（科學上的直流電；還有DC Comics漫畫公司）。After Washington放在Washington後面, or或 as a place當地名用時, it means它指的就是 this district這個特區。