这是我第三次把钥匙掉了,更糟糕的是:一个存有很重要申报材料的u盘也在上面。
This is my third time to lose my key.What made thing worseis that a Udisk with important appkication material was linked on it.
This is the third time I dropped my key, and even worse: there are very important to declare a material u are above the disk.
This was third time I lost my keys, and worst of all: the USB stick which contain a very important application was attached with the keys.
This is the third time that I had lost my keys, worse: an entity important filing materials in the above u dish.
这是我自己翻译的(不太喜欢机译,好多都翻译得很荒谬):
It's the third time I have lost my keys,to make matters worse,a USB flash disk that contains some important application materials is ——(此处不知道你说的在上面是指哪里,估计应该有上下文衔接的,比如in the house).
希望能够帮到你!