To start with, where and when did it happen?首先，这事发生在何时何地？Well, maybe it would be easier to start with a smaller problem.那么，也许从小问题入手会更容易些。Success was assured and, at least to start with, the system operated smoothly.成功有保证...
The men had to slog up a steep muddy incline.人们只得在陡峭而泥泞的斜坡上艰难地行进。The men had to slog up a steep muddy incline...人们只得在陡峭而泥泞的斜坡上艰难地行进。Marking the exam papers was quite a slog.评阅试卷是很辛苦的工作.But there must be no talk of final ...