同义词: petty officer PO
以上来源于: WordNet
"By two thousand and twenty, C.O.P.D.will likely be the third leading cause of death across the world."
VOA: special.2009.06.23
This actually I think derives from a Greek word, "Synkope, " S-y-n-k-o-p-e, synkope.
这个术语我觉得来源于希腊语,Synkope,S-y-n-k-o-p-e
Let us say P for plane, G for ground, O for object.
我们定义 P 是平面,G 是地面,O 是物体
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