狸嚼烂树木来得到食物和建造家的材料。
The beaver chews down trees to get food and material with which to build its home.
卷毛狗过去曾在猎鸭中作为寻猎犬来使用，但是美国养狗俱乐部并不认为它们是运动型犬种，因为它们现在主要作为宠物犬来养。
Poodles were once used as retrievers in duck hunting, but American Kennel Club does not consider them sporting dogs because they are now primarily kept as pets.
由现在对物理学和化学的认识，科学家已经能够在生物医药方面做重大的探索。
As a result of what is now know in physics and chemistry,scientists have been able to make important discoveries in biology and medicine.
