She feels she can doctor herself for just a common cold.
她覺得她能給自己治療，因為這僅是一般的感冒。
Snow is common in cold countries.
在寒冷的國家雪是常見的。
The common cold is a good example: women, on average, get fewer colds than men ．
普通感冒這個例子足以說明這點：女性平均感冒的次數比男性少。
Will they never find a cure for the common cold?
他們永遠也不能找到治療感冒的方法么。
Like the common cold, it spreads through the air.
與普通感冒一樣，該病經空氣傳播。