通过对感冒与冷空气活动过程的分析，找出了冬半年中的感冒高发期。
It is found that the favorable incidence of common cold in winter.
三四月份的中国北部冷空气活动频繁。它给该地区带来了大风和沙尘暴。
Cold air is frequent in March and April in northern China and it brings gales and sand storms to the areas.
本文对1981年不同月份8次东亚冷空气活动的陆地变性过程进行了分析。
Authers have studied the transformation processes of cold air over land in East Asia for eight cases which occurred in different months of 1981.
太平洋副热带高压大而强，位置偏南，脊点偏西。南半球冷空气活动比常年少而弱。
The Pacific subtropical anticyclone appears strong and large, its position leans toward south, and its ridge extends to west.
由于AO为负值，东亚冬季冷空气活动强且路径偏东，使得达到西南地区冷空气偏弱。
This cased an obviously negative phase of the AO and brought strong winter monsoon and eastward tracks of cold waves into East Asia, which led to a weakening of cold air arrived in Southwest China.
阴气至极，阳气始生。冷空气活动频繁，人体阴气较重，防寒保暖，及时补充高热量食物。
Yin Qi comes to it's extreme, Yang Qi buds, waether is cold, internal Yin rising, keep warm and supplement high carolie food in time.
南半球澳洲附近、南太平洋、南印度洋的热带气旋数的变化与北半球亚洲大陆的冷空气活动有密切的联系。
On the other hand the change of frequences of tropical cyclone on the southern hemisphere is associated with the strength of the cold air in northern hemisphere.
比赛中有的运动员会突然出现腹痛，其原因一般来说是准备活动做得不充分，加上天气比较冷，开始跑时吸入了大量的冷空气或起跑速度过快等，出现“岔气”现象。
Some athletes may suffer a sudden abdominal pain during the race, which is often caused by insufficient warming-up exercise, a cold weather so that a lot of cold air is inhaled, or running too fast.
比赛中有的运动员会突然出现腹痛，其原因一般来说是准备活动做得不充分，加上天气比较冷，开始跑时吸入了大量的冷空气或起跑速度过快等，出现“岔气”现象。
Some athletes may suffer a sudden abdominal pain during the race, which is often caused by insufficient warming-up exercise, a cold weather so that a lot of cold air is inhaled, or running too fast.
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