21+30=51的英语怎么写
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21+30=51的英语怎么写21+30=51的英语怎么写21+30=51的英语怎么写21plus30equalto5130th31st32ndthirtieththirty-firstthirty-s
21+30=51的英语怎么写
21+30=51的英语怎么写
21+30=51的英语怎么写
21 plus 30 equal to 51
30th 31st 32nd thirtieth thirty-first thirty-second thirtieth thirty-first thirty-second 和1.2.3.4.5…的序数词一样啦，只是前面多
21 and 30 is 50
twenty one plus thirty is fifty one
twenty-one plus thrity is fifty-one
twenty-one plus thrity is fifty-one ，最简单了这样。
twenty-one plus thrity is fifty-one 应该是这样
Twenty-one plus thrity is fifty-one .