名詞 twelve:

1. the cardinal number that is the sum of eleven and one
   同義詞：12, XII, dozen

形容詞 twelve:

1. denoting a quantity consisting of 12 items or units
   同義詞：12, xii, dozen

1. She often puts in twelve hours' work a day.
   她常常一天工作十二小時(shí)
2. How old are you? I am twelve (years old).
   你幾歲？我十二歲。
3. At midnight you'll hear the clock strike twelve.
   午夜時(shí)你會(huì)聽到鐘打12點(diǎn)。
4. How many lessons are there in this book? There are twelve lessons in this book.
   這本書里有幾課？ 這本書里有十二課。
5. The clock struck at twelve o'clock sharp.
   鐘在整十二點(diǎn)鐘打點(diǎn)。
6. My mother could not come twelve thousand miles from Australia in time of war to meet Bill's girl.
   我母親不可能在戰(zhàn)爭(zhēng)期間旅行12,000英里從澳大利亞來見比爾的女朋友。
7. I go out for lunch at twelve.
   我十二點(diǎn)出去吃午飯。
8. Twelve months constitute one year.
   十二個(gè)月構(gòu)成一年。