写作思路:体现出研究动物的重要性,以及人类研究动物所的得到的成果。正文:In order to explore the mysteries of nature, expand human vision, increase wisdom and invent, animals should sometimes be regarded as teach
I am going to have a busy weekend.On Saturday,I am going to do my homework in the morning.On Saturday afternoon,I am going to read a magezine.I am going to see a film on Sunday morning.On Sunday
in the last 400 years, the number of animals and plants becoming extinct has reached crisis point. Human population levels have risen dramatically in the same time period and man's predatory instincts combined