post insurance office box邮箱
post-office box邮政信箱
post- office box邮政信箱
The Headmaster's Post-office Box校长的信箱
a post office box邮政局
post office box mailbox邮筒
pob post office box邮政信箱
post office letter box邮政局信箱
Post office private box邮政用户专用信箱
N-COUNT（可数名词） A post office box is a numbered box in a post office where a person's mail is kept for them until they come to collect it. 邮政信箱