Seasonal influenza comes and goes (typically, it affects up to 20% of America's population), with the virus evolving slightly from one winter to the next.
季节性流感来来去去(值得注意的是，美国20%以上的人口曾感染过)，一年又一年间，流感病毒已经悄悄发生了变化。
Seasonal influenza comes and goes (typically, it affects up to 20% of America’s population), with the virus evolving slightly from one winter to the next.
季节性流行感冒来来去去，通常会感染到美国人口的20%，而且每年冬天的病毒会因为持续演化而产生稍微的差异；
Snakes hibernate in winter, and this one wants to have a good meal before it goes to sleep.
蛇冬天要冬眠，它只想在冬眠以前好好的饱餐一顿。
My winter vacation this winter, I ' Goes to from Shanghai's Harbin's m and my family's one week.
我的冬天假期这个冬天，I'去到从上海的哈尔滨的m与我家的一个星期。
As a saying goes, the Winter Solstice is past and the Slight Cold, the Great Cold and the New Year come to us one by one.
俗话说，冬至过去到小寒，过了小寒是大寒，过了大寒就过年。
As a saying goes, the Winter Solstice is past and the Slight Cold, the Great Cold and the New Year come to us one by one.
俗话说，冬至过去到小寒，过了小寒是大寒，过了大寒就过年。
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