F-f cavity preselector

cavity ['kævəti]

n. 腔，洞;蛀牙，龋洞;

cav洞+ity表名词 → 穴；腔

preselector

[计] 预选器, 预选程序

Now let's head off for the city and the university club.

现在让我们进城去， 到大学俱乐部。

I started school at the age of 6.

我六岁开始上学。

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。