How slow it is!
Have you been to the Moon and back? 你到月球上去了一趟才回来吗？（就是说对方太慢啦，幽默的说法）正常翻译：How could you be so late?
如果是指别人来的慢了， why are you so late 比较合适， how could it be so slow
How can it be so slow ？
