在坡顶绝不要企图超车.Never attempt to overtake on the crest of a hill.最后的一番苦挣扎终于把邮车拉上了坡顶.The last burst carried the mail to the summit of the hill.在坡顶处, 重力逐渐产生动量,将车体向下拉.At the top of the hill, gravity pulls the train down building...

“坡顶”的英语可以翻译为：[交]top of slope ...