Aircraft production continued to plod along at an agonizingly slow pace.飞机制造业仍旧举步维艰，发展速度之缓很让人头疼。They had to plod wearily on up the hill.他们不得不迈着疲倦的步子登上山.to plod through mud在烂泥里吃力地走He was destined to plod the path of toil....
Aircraft production continued to plod along at an agonizingly slow pace.飞机制造业仍旧举步维艰，发展速度之缓很让人头疼。He was destined to plod the path of toil.他注定要在艰辛的道路上跋涉.They had to plod wearily on up the hill.他们不得不迈着疲倦的步子登上山....
Aquifers have water contents over 30 %.含水层的水含过30%.Untrammelled industrialisation, particularly in poor countries, is contaminating rivers and aquifers.不节制的工业化, 尤其是在穷国, 正在污染河流和地下含水层们.There are three types of aquifers: per...