Left alone at home it

One day when I was home alone a parcel was left at the door I opened it and there was a box.

一天，我独自在家，在门前发现了一个包裹，我打开一看，是一个盒子。

Parents spend less time with their children, who may be left alone at home for longer. Is it just a coincidence that juvenile crime is on the rise?

美国青少年犯罪现象上升与父母在家时间少有联系，因而它可能是人们工作时间延长的一种后果。

It is dangerous for children under five years old to be left alone at home.

把五岁以下的儿童独自留在家里是很危险的。