从偏冷期到偏暖期，整个热带对流层顶显著变暖。
The whole tropical tropopause has been warmed up from cold period to warm period.
天气可能在12月期间有些冷，这不利于巡航。
The weather may be somewhat cold during Dec which isn't good for cruise.
发作期以热哮多见，其次为冷哮、虚哮；
The seizure of asthma is mainly in spring, and is mostly evoked by cold.
发作期以热哮多见，其次为冷哮、虚哮；
The seizure of asthma is mainly in spring, and is mostly evoked by cold.
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