他们的生活需要水，并适宜湿度在85%或之上。

They need water for their activity, and are active at 85% humidity and higher.

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因此，每逢秋天，就在寒冷潮湿的天气来临前，他总是等待湿度达到适合的水平，风向和风速适宜才燃起他那50英亩土地的某些部份。

So each autumn, before wet, cold weather leaks over the mountains, he waits for the humidity to be just right, for the wind to blow just so, and then he burns portions of his 50-acre spread.

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那个夏天天气酷热，地而湿度适宜，提早播种就可以在热浪打蔫植尖之前完成授粉，同于干旱更没有爆发洪水，产在田里的玉米得以保存。

For that on blistering summer, the ground moisture was just right, planting early allowed pollination before heat withered the tops, and the lack of rain spared the standing corn from floods.

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