M-3：make a dent 起作用
A:How are you getting along with your English learning?
A:你的英语学得怎样了？
B:I haven't even made a dent after a year's study.
B:一年了好像根本没有什么进步。
A:Maybe you should improve your methods.
A:也许你应该改进一下学习方法。
B:I think so.
B：我也是这样想的。
