three quarter和three fourths的区别

three-fourths 和 three fourths 哪个表达方式是对的? 四分之三A) three quarters B)three-quarter C)three fourths 选A,为什么 "a fourth"和“three fourths”是什么意思? three fourths和the third four分别是什么意思,有什么区别 three family和three families的区别 fifty-three和fifty three的区别 three time和 three times的区别 three quarter 中文意思 three quarter beds three quarters 和three fourth的区别和用法 in three weeks 和in three weeks'time 的区别 three daYs' off和three days off的区别.