第15课第5节 单词
1  silly  adj.愚蠢的
It's silly of you to trust him.
你想信他的话,真是愚蠢.

2  social  adj.社会的
Juvenile delinquency is a serious social problem in this country.
少年犯罪是这个国家一个严惩的社会问题.
adj.联谊性的
It was a social meeting, and no one discussed business.
这是联谊会,没有人讨论业务.
n.society

3  splendid  adj.堂皇的
The rich man lives in a splendid house over there.
那有钱人住在那边一栋堂皇的房屋内.

4  steer  n.公牛
The steers were fattened for market.
羊肥公牛是为了销售.
同.ox 
v.驾驶
We steered the boat toward land.
我们将船驶向陆地.
同.guide;navigate 

5  substitute  v.代替
We often substitute margarine for butter.
我们经常用人造奶油代替奶油.
 

6  swing  v.摇摆
The big ape swung itself from branch to branch.
那大猩猩在树枝间荡来荡去.

7  thirst  n.口渴
The horse satisfied its thirst at the river.
那匹马在河边痛饮解渴.

8  trace  n.踪迹
The police were unable to find any trace of the thief.
警察找不到小偷的任何踪迹.
v.追溯
His family can trace its history back to the 10th century.
他的家族史可追溯至10世纪.
同.track 

9  union  n.联合
The United States of America is a federal union of fifty one states.
美国是50个州的联邦.
同.combination 

10  visible  adj.可见的
The shore was barely visible through the fog.
在雾中几乎看不见海岸.

11  whistle  v.吹哨
The policeman whistled for the automobile to stop.
警察吹哨要汽车停住.