noun[ C ]environmentspecializeduk/ˈkɑː.bən ˌsɪŋk/us/ˈkɑːr.bən ˌsɪŋk/
碳汇,碳库(可通过吸收地球大气中的二氧化碳减缓全球变暖的大片森林)
an area of forest that is large enough to absorb large amounts of carbon dioxide from the earth's atmosphere and therefore to reduce the effect of global warming