二十
先理解核心含义，再看它在真实句子里的用法。
二十
twenty
Please write a clear 20 at the top of your answer sheet.
请在答题纸的顶部写一个清晰的20。
二十; twenty
n the cardinal number that is the sum of nineteen and one；s denoting a quantity consisting of 20 items or units
The 20 on the door tells me this is the right room.
门上的20告诉我这是正确的房间。
My little brother can count to 20 without any help.
我弟弟不用任何帮助就能数到20。
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Dictionary facts from ECDICT, WORDNET.