菖蒲在沙漠中发现和沼泽，在炎热和寒冷的气候。
Irises are found in deserts and in swamps, in hot and cold climates.
很难直接比较在炎热和寒冷国家温度对于经济增长的影响，因为有太多变量需要控制。
It is hard to compare the impact of temperature on growth in hot and cold countries directly, since there are too many variables to control for.
作为长跑选手，你的目标就是让你在炎热和寒冷的天气下不断的喝水，让你不会口渴。
Your goal as a distance runner should be to consistently hydrate yourself during both warm and cold weather so that you never become thirsty.
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