ps help to translate and analyse grammar
Europe's freight, rumbling through on the backs of 40-ton lorries,has been clogging the alpine valleys for years. [b]回复 [url=http://bbs.tingroom.com/redirect.php?goto=findpost&pid=250485&ptid=115483]1#[/url] [i]Monica1020128[/i] [/b]欧洲的货运，隆隆的40吨卡车通过的背影，已经堵塞多年的高山峡谷。 欧洲的货运，从几年前就开始可以听到货车后的40吨货物通过高山时发出的隆隆声。 欧洲的货运，装在隆隆驶过的40吨卡车的后面，已经拥堵了阿尔卑斯山谷多年了。
Europe's freight, rumbling through [on the backs of 40-ton lorries],has been clogging the alpine valleys for years.
----主语------ , ----定语（修饰前面主语）---[ ]状语修饰rumble-----, --------谓语------------------------------.
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