?? 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;
tobacco
[t?'b?ko]
n. 煙草，煙葉;煙草制品;卷煙;紙煙;
??? 情景例句
Charley was the star of the team.
Charley，是當時隊里的明星。
I opened all the doors.
我打開了所有的門。
they can locate and steer clear of obstacles -- or locate flying insects on which they feed.
并能通過回聲來確定并躲開障礙物，或找到它們賴以為生的昆蟲。