po意思是Post的缩写，表示发布、发帖的意思。
post的用法例句
1、We post up a set of rules for the house.我们张贴了一份房屋生活守则。
2、He flipped through the post without opening any of it.他飞快地翻了一下邮件，但一封也没有打开
3、Now look yonder,just beyond the wooden post there.看那边，就在木头柱子的旁边。
4、He really was one of the finest boxers in post-war Britain.他确实是战后英国秀的拳击手之一
5、The pilot wisely decided to return to Farnborough post haste.飞行员明智地决定尽快返回法恩伯勒
6、I didn't want us to be pipped to the post我不希望我们在最后一刻落败。
7、The once-powerful post unions have been cut down to size.一度很强势的邮政联盟已经威风不再
8、Eddie parked his cycle against a lamp post and padlocked it.埃迪把他的自行车靠在路灯柱上，用挂锁锁好
9、She had earlier resigned her post as President Menem's assistant.她早些时候辞去了梅内姆总统助理一职。
10、Grace Robertson started as a photographer with Picture Post in 1947.格雷斯·罗伯逊于1947年参加工作，做了《图片邮报》杂志的一名摄影师