Plants do best in the light and temperature of their native environment. For instance, tropical plants like their surroundings bright and humid, while cacti need sunlight but very little water.
植物在光照和适于它们的自然环境下的温度中生长得最好，比如：热带植物喜欢明亮且潮湿的环境，而仙人掌需要光照但只需要很少的水。
So to have the same temperature, a planet needs to be much closer to that star than it would be from the sun, where you'd have a temperature where you might have light and liquid water.
所以一个行星上要有足够的温度，那么这个行星距恒星的距离就得比它距离太阳的距离近，这样，这个行星上才能具备合适的温度，维持一定的光照和液态水。
Three things limit plant growth: light, water, and temperature.
有三个要素会限制植物生长：阳光、温度和水。
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