影响蚊虫种群密度的最重要的因子是最低温度，然后依次是最高温度、月温度变化和雨天数。
The most important factor influencing mosquito population is the lowest temperature, and then the highest temperature, month temperature change and precipitation days.
头盔有不同种的类型，有些头盔的前方带有塑料帽舌是为了保护眼镜免遭太阳的暴晒和雨天的雨水。
Helmets come in many different shapes Some have plastic visors on the front to shield eyes from sun or rain.
即使在雨天，玛丽和科林也不无聊。
Even on wet days it could not be said that Mary and Colin were dull.
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