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Monica1020128

Europe's freight, rumbling through on the backs of 40-ton lorries,has been clogging the alpine valleys for years.

mickey918

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------------------------------.
个人愚见 仅供参考

xiaomeixin

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。

tingroom

回复 1# Monica1020128


    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。