This well balanced alliance brings benefits 这种完美平衡

35. and the polyps feed by snaring passing morsels with their tentacles.
    珊瑚虫利用触手抓食经过它身边的食物
36. At night, the algae are inactive but then, the polyps put out even more tentacles
    到了晚上,共生藻停止工作 珊瑚开始释放更多的触手
37. so coral in effect feeds around the clock.
    这样,珊瑚虫可以昼夜不断地有效进食
38. This well balanced alliance brings benefits
    这种完美平衡
39. to both polyps and algae and between them,
    不仅有益于给珊瑚虫和藻类
40. they turn the barren seas into rich gardens.
    同时也把荒凉的海洋变成了绚丽的花园
41. The Indonesian reefs contain such a variety of life
    印度尼西亚的珊瑚礁之所以 容纳了如此多的海洋生物

来自《行星地球 第一季 第九集 Planet Earth S01E09 海洋》第 38 行