An ecosystem is all the plants and animals that live in a particular area together with the complex relationship that exists between them and their environment.
双语例句
例：
the forest ecosystem.
森林生态系统。
例：
Madagascar's ecosystems range from rainforest to semi-desert.
马达加斯加的生态系统从热带雨林到半沙漠地带都有。
例：
Human over-fishing has destabilised marine ecosystems.