为什么50 meters race等于50-metre race

为什么50 meters race等于50-metre race 英语连字符用法100 meters race转换后是100-meter-race 还是 100-metre race?是 100-metre race 400-meters race 还是 400-meter race race was.race.metre.there的翻译 为什么是5 minutes’而不是5--minute,是400--meter race 而不是400 meters’ After 1,500-metre race,he lay the lane,______. he is ___breath after a 1000-metre race. a. second took race 100-metre the place in the pete THERE IS A FIRST HUNDRED METRE RACE[改错] Yesterday I took part in the b________ 100-metre race