替代词替代重复部分的时候具体替代谁?例句:If railroads charged all customers the same average rate, they argue, shippers who have the option of switching to trucks or other forms of transportation would do so.替代词do so可以替代动+宾+状的整个谓语部分,那么这...
...the period.over the period似乎是以一种鸟瞰(bird's eye view)的角度,「总结性」地看待这段时间。农场数量在时间内可能时而降时而升,但整体是下降的。The number of farms declined throughout the period.throughout似乎就是在穿行这个...
Once considered career suicide, sabbatical are now not only accepted—but encouraged—by some employers.这句话中,破折号的表达“—but encouraged—”,和没有破折号的表达“but encouraged”区别在哪里?