了解生物多样性及其重要性

Hello. The programme you're about to listen to was first broadcast广播 on the BBC Learning English website in January 2010. For more English language learning programmes and podcasts, search搜寻 for BBC Learning English. The term 'biodiversity生物多样性' is a shortening of the expression 'biological生物的 diversity差异'. It refers to the variety多样化 of all life forms on our planet, from trees to rice and roses, from elephants to tiny organisms like bacteria细菌. It also covers rainforests, oceans and deserts, various各种各样的 environments or ecosystems where forms of life depend on each other.