She has been toiling away on her science project for months .
她为她的科学作业已经辛苦研究好几个月了。
Europe 's toiling masses sometimes go on strike , leaving streets unswept and commuters stranded .
欧洲的劳苦大众们有时会罢工游行，喧嚣过后留下一街的垃圾和无法通行的上班族。
These were taken in coal mines thousands of miles east of the glaciers and they show miners covered in soot and toiling away in the bowels of the earth .
这些照片拍摄于距离冰川东部数千英里的煤矿，照片上的矿工身上布满了煤尘，在地球的深处辛勤地劳作。
Fulton created the steamboat , george lodge invented the press machine , francis lowell improved the modern factory system , mccormick invented the large harvester , which liberated the toiling farmers .
