?? 詞語組成解析
common
['kɑm?n]
adj. 普通的;通俗的;[數學]公共的;共有的;
n. [法律]（對土地、水域的）共有權;公共用地;普通;平民;
gum
[ɡ?m]
n. 口香糖;樹膠;黏膠;牙齦;
vt.& vi. 膠合;涂以樹膠;使…有粘性;
n. 巖薔薇\\n[醫] 巖茨屬, 巖薔薇屬
??? 情景例句
I think I am very good at planning.
我認為我最擅長計劃。
A servant is known by his master's absence.
主人不在可以看出仆人的品行來。
I want you to look at this material.
我要你看看這材料！