12的英文是twelve，音标：[twelv]；复数：twelves；派生词： twelfth，第十二个；
例句：
We have been gradually bled for twelve years.
我们被一点一滴地压榨了12年。
We were set upon by about twelve youths and I was kicked unconscious.
我们遭到了大约12名青年的袭击，我被踢晕过去了。
I shall stay here until twelve o'clock.
我将留在这里一直到十二点钟。
I met some friends and stayed out until eleven or twelve.
我见了几个朋友，直到夜里十一二点才回家。
He had a tea-break about twelve.
十二点左右，他放下工作休息了一下。
