1. The river is navigable during the rainy season.
   该河在雨季可以通行。
2. Most tropical areas have rainy and dry seasons.
   大多数热带地区有雨季和旱季。
3. A raincoat is a must in the rainy season.
   在雨季雨衣是必备之物。
4. The rainy season sets in soon.
   梅雨季快开始了。
5. The rainy season commences now.
   雨季现在开始。

　1个名词解释