twenty-one o'clock 英语中没这样表达的吧?

twenty-one o'clock 英语中没这样表达的吧? One o'clock的英语序数词是什么 英语中时间表达的问题在两点：at two o'clock this afternoon能不能把后面的o'clock省略, 英语翻译twenty past ten.a quarter past twelve .one o'clock .half when the clock says twenty-five,what time is it?A.One o'cloc one O'clock和one o'clock哪一个是对的? 急呀! It’s twenty-two o’clock.翻译 英语twenty-one和twenty怎么读的? 英语中,小数点后面的数字怎么读?比如.21读two one 还是twenty-one? 13:00 用英语咋么说?是one o' clock p.m.还是thirteen o' clock 英语行文中,表达几点钟哪种说法更地道?如 nine o'clock, 9 o'clock?即用英文和阿拉伯数字哪个更好些 twenty-one 和 twenty one 的区别