翻译：you should go through your paper manytimes--and then agai

翻译：you should go through your paper manytimes--and then again--working to substantiate you ideas
谢谢了.
特别的是其中的and then again--working to……什么意思.
work 在句子中作什么成分,什么意思,为什么用现在进行时.
高人们帮帮啊,谢谢了.