Primitive ovum

primitive ['prɪmətɪv]

adj. 原始的;发展水平低的;落后的;[生物学]原生的; n. 原始人;早期的艺术家（作品）;单纯的人：不世故的人;自学的艺术家;

prim第一，主要+itive形容词后缀 →原始的

ovum

n. 卵, 卵子, 卵形装饰\\n[医] 卵, 卵子

Littering is a serious offense in some countries.

乱扔垃圾在某些国家是严重的违法。

Thank you but this is something I have to solve by myself.

但有些事情我必须自己解决。

Next, if it is not a story, get an idea of the organization of the book. Read the back cover and the introduction. Look at the pictures and the short texts below them. Turn to the front of the book and look at the contents. This way you can decide whether

其次，如果不是故事书，你就要对书的篇章结构有所了解。看看目录。这样，你就可以判断这本书是否可能引起你的兴趣。如果是这样，你就可以断定哪几个部分最有用，最有趣。