1，复习
1,versatile,able to own many abilities.
2,allergy,allergic.
3,arid,dry.
4,bedrock,have real and abstract meaning.
①the hard area above loose sooil.
②some principles base on.
5,carnivore,animals eat meat.
6,convex...the opposite to concave..(话说前三天没找到这个concave)..something break out.
7,
原文：https://www.cnblogs.com/beiyueya/p/12395229.html