to remove things from a suitcase, bag, or box

I haven't even had time to unpack (my suitcase/clothes). 我甚至还没有时间打开箱子整理／把衣服从箱子里拿出来。

to explain or examine something in order to make its meaning clearer

He read the agreed statement to the group and then began to unpack it for them. 他把已达成一致的声明读给这群人听，然后开始向他们解释其意义。