Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
conservation – n. the protection of animals, plants, and natural resources
fang – n. a big, sharp tooth
hoof – n. the curved, hard part of the foot of some animals like a horse
species – n. a group of living organisms who have similar physical qualities
ensure – v. to make (something) sure or safe
biodiversity – n. the different kinds of life in an environment
