She feels she can doctor herself for just a common cold.
她觉得她能给自己治疗，因为这仅是一般的感冒。
Snow is common in cold countries.
在寒冷的国家雪是常见的。
The common cold is a good example: women, on average, get fewer colds than men ．
普通感冒这个例子足以说明这点：女性平均感冒的次数比男性少。
Will they never find a cure for the common cold?
他们永远也不能找到治疗感冒的方法么。
Like the common cold, it spreads through the air.
与普通感冒一样，该病经空气传播。