Mt. is the written short form of Mount, put in front of a mountain's name: Mt. Fuji, Mt. Everest.

Mt. Mt. is是 the written short form of Mount Mount的書寫縮寫，put in front of a mountain's name放在山名前面：Mt. Mt. Fuji Fuji，Mt. Mt. Everest Everest。

You write the short form; you still say 'Mount' when you read it out loud. In American writing the full stop is common (Mt.); British writing sometimes drops it (Mt).

You write the short form你用縮寫的方式寫；you still say 'Mount' when you read it out loud但唸出來的時候還是唸「Mount」。In American writing the full stop is common在美式寫法裡句點很常見(Mt.)（Mt.）；British writing sometimes drops it英式寫法有時候會省略(Mt)（Mt）。

It is for names, not for the common noun — you do not write 'a mt.' when you mean 'a mountain'. Maps, road signs, postcards, and addresses use it to save space.

It is for names這是用在名字上的，not for the common noun不是用在普通名詞上——you do not write 'a mt.' when you mean 'a mountain'當你想說「一座山」的時候，不會寫成「a mt.」。Maps, road signs, postcards, and addresses use it to save space地圖、路標、明信片、地址都用它來省空間。

Though actually, the same letters can look like other short forms (Mountain in some street names, and in US writing Mt can also be Montana), so the name after it is what tells you this is the mountain sense.

Though actually不過事實上，the same letters can look like other short forms同樣的字母可能看起來像別的縮寫（Mountain in some street names在一些街道名稱裡是Mountain，and in US writing Mt can also be Montana而在美式寫法裡Mt也可能是Montana），so the name after it is what tells you this is the mountain sense所以後面接的名字才能告訴你這是「山」的意思。

If you see 玉山 in English as Mt. Jade, that is this use.

If you see 玉山 in English as Mt.如果你看到玉山的英文寫成Mt. Jade Jade，that is this use那就是這個用法。