火山又向空中喷出了岩浆和火山灰。The volcano threw new showers of magma and ash into the air.火山喷出火焰和岩浆.A volcano spouts flame and lava.火山喷出岩浆.The volcano disgorges lava....
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....