When ocean temperatures rise, corals expel their microscopic symbionts, causing the coral to appear white or bleached.

当海洋温度上升，珊瑚会排出共生的虫黄藻，进而导致珊瑚白化。

Broad beans, then, really do seem to be using their fungal symbionts as a communications network, warning their neighbours to take evasive action.

这样看来，似乎蚕豆真的在把它们的真菌共生体当作信息传递网络，以便在危险来临时提醒“邻居们”采取规避措施。

Those algae are symbionts — organisms that help their host (because it also helps themselves). These algae make food, which they'll share with the coral. When hot water makes the algae flee, the corals turn white and can eventually starve.

这些藻类是共生体——帮助宿主的生物体（因为它也帮助自己）。这些藻类制造食物，并与珊瑚分享。当热水使藻类逃离时，珊瑚就会变白并最终挨饿。