身材瘦削而且訓(xùn)練艱苦的女運(yùn)動(dòng)員行經(jīng)可能不那么頻繁，或者根本不來(lái)月經(jīng)。Lean hard-training women athletes may men-struate less frequently or not at all.這路公共汽車行經(jīng)許多街道.This bus route covers a large number of streets.當(dāng)汽車行經(jīng)村莊時(shí),我看到了一群羊.I saw a flock of sheep when ...