Corals require algae to survive and algae require sunlight, and both together require steady minimum temperatures.

珊瑚需要藻类维持生命，而藻类需要阳光。二者都需要稳定的起码温度。

The minimum temperature for metropolitan Sydney will be 13, rising to a maximum of 30 degrees Celsius.

悉尼大都市的最低气温为 13 度，最高可达 30 摄氏度。