(1) one by one 一個個地 Students went out of the classroom one by one as soon as the bell rang. 下課鈴一響，學生們一個個從教室裡走出來。

(2) at one 一緻 Their opinion is at one. 他們的意見一緻。 另外，還表示在一點鐘Listen, I finish at one.

聽我說，我一點鐘收工。

(3) in one 合為一體 It's a book of English phonetics，grammar and usage in one. 這是一本英語語音、語法和習慣用語結合為一體的書。

(4) one another 互相 We should help one another． 我們應該互相幫助。

(5) one to one 一比一 Neither of them won，one to one. 他倆沒一個赢，而是一比一。

(6) one too many 多餘的，不需要的 I found myself one too many among people. 我發現自己在人群中是個多餘的人。

(7) one in a thousand 優秀的人（或事物） My brother is a one in a thousand． 我的兄弟是位優秀人物。

(8) taking one with another 總的看來 The youth，taking one with another，is a nice worker． 總的來說，這位年青人還是個不錯的工人。

(9) from the first 首先；馬上；立刻 I knew him from the first． 從一開始我就認識他。

(10) first off 首先；馬上；立刻 They come to our office first off． 他們馬上就要到我們辦公室來。

(11) first water 極端 ；一流的，頭号的

You are a fool of the first water. 你真是個大傻瓜。

All the products made by the factory are of the first water.

這家工廠生産的産品都是一流的。

Diana is nothing but a fool of the first water.

黛安娜隻不過是個大傻瓜而已。

He's a snob of the first water.

他是個頭号勢利小人。

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