Lignin building unit

lignin

n. 木质素\\n[化] 木质素; 木素

building ['bɪldɪŋ]

n. 建筑物;楼房;房屋;建筑（艺术或行业）; v. build的现在分词;

build建造+ing某种行为的产物→建筑物

unit ['ju:nit]

n. 单位，单元;装置;个体;[数]单位数;

Can you spare some cash?

你能借我点现金吗？

John has built up his own business.He owns a hotel.

约翰建立了他自己的生意，他拥有一家宾馆。

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。