It's the world's largest island, but it's also the world's smallest continent.
它是世界上最大的島嶼,同時(shí)也是世界上最小的洲。
Bison waste no longer fell on the ground to improve the soil, which as a result became less good for growing plants.
地上不再有野牛的糞便來改良土壤,結(jié)果對(duì)于植物生長(zhǎng)土壤變得不夠肥沃了。