?? 詞語組成解析
common
['kɑm?n]
adj. 普通的;通俗的;[數(shù)學(xué)]公共的;共有的;
n. [法律]（對土地、水域的）共有權(quán);公共用地;普通;平民;
louse
[laus]
n. 虱子;寄生蟲;卑鄙的家伙;
vt. 搞糟，辦砸;捉虱子，除虱子;
??? 情景例句
Real proud.
真的驕傲。
I was born and raised here.
我生于斯，長于斯。
Once the oxygen content of the air had risen to 25% it was ready to burn.
一旦氧氣在空氣中的含量達(dá)到25%，它就要燃燒。