吃透英语课本，提升在校竞争力
phrase. 难怪； 怪不得
It should be no wonder that you have not mastered the understanding of them all. No one ever will.
难怪大家没有全部掌握并理解这些知识，因为根本就没人能做得到嘛！
No wonder he is tired; he didn't sleep at all.
难怪他累了，他根本没睡觉。
No wonder he is tired; he worked all night.
难怪他累了; 他工作了一整夜。
