■indulge v. 使沉迷(to allow oneself to enjoy sth)

常用短语：indulge oneself in sth. 沉迷于...... == be indulged in

Eg: He indulged himself in smoking and drinking.

    He was indulged in smoking and drinking.

v. 纵容, 放任，迁就(to allow oneself / sb to have whatever one / he likes or wants)

Eg: She indulges her only son.

■seriously adv. 严肃地，认真地，真诚地(in a serious way)

常用短语：take sb / sth seriously 郑重对待，认真对待

Eg: When reports came into London Zoo that a wild puma had been spotted forty-five miles south of London, they were not taken seriously. (NCE3 lesson 1)新概念英语电子书

在本课中，seriously出现了两次，已用蓝色字体在课文中标出，其中一次就是上述短语的应用。

■silly adj. 无意义的，无聊的，傻的，糊涂的(not showing thought or understanding)

比较：

foolish  愚蠢的，笨的，不明智的，人及言行缺乏良好的判断力(showing lack of good sense or judgment)

Eg: I remonstrated him not to do anything foolish.

silly    无意义的， 无聊的，无知的

Eg: Being called silly is not compliment.  /   Don't play such a silly hoax.

stupid  愚蠢的，不聪明的，没有判断力的(showing lack of good judgment; slow to learn or understand things; not intelligent or clever)

Eg: His son is as stupid as all.  /  What a stupid thing to do!