是By offering 还是 by offerring 一个R还是两个R?

是By offering 还是 by offerring 一个R还是两个R? 是by ourself还是by ourselves? by 是by boat 还是by a boat 请问如果表示时间 by ten o'clock中by的意思这个by指的是在十点以前,还是在十点那个时间点? 是by last term还是 by the last term 是Time gose by还是Time go by…… “时光飞逝”是time went by 还是 time goes by? 英语 ：通过旅游是用by travel 还是by travelling? by ten o'clock by ten o'clock意思by ten o'clock翻译是……其中by翻译成什么 是with hand 还是by hand? 是use escalator 还是 by escalator passer-by是可数还是不可数? 是rise 4%,还是rise by 4% by by by by