十二单词是twelve。twelve的例句：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）。

twelve的例句：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）；The building will house twelve boys and eight girls（这座房子里会住12个男孩和8个女孩）。