The Independent Television Commission, regulator of television advertising in the United Kingdom, has criticized advertisers for "misleadingness"—creating a wrong impression either intentionally orunintentionally—in an effort to control advertisers' use of techniques that make it difficult for children to judge the true size, action, performance, or construction of a toy. (TPO14, 52)

我是分界线，大家先测试一遍速读是否理解

The Independent Television Commission, (regulator of television advertising in the United Kingdom), has criticized advertisers for "misleadingness"(—creating a wrong impression either intentionally or unintentionally—)(in an effort)(to control advertisers' use of techniques)(that make it difficult for children to judge the true size, action, performance, or construction of a toy.)

分析：

修饰一：(regulator of television advertising in the United Kingdom) ，同位语

中文：英国电视广告的管理者

修饰二：(—creating a wrong impression either intentionally or unintentionally—)，破折号和非谓语动词

中文：他们有意或无意营造了一个错误的印象托福英语培训

修饰三：(in an effort) ，介词短语

中文：努力

修饰四：(to control advertisers' use oftechniques)，非谓语动词

中文：控制广告商对技术的使用

修饰五：(that make it difficult forchildren to judge the true size, action, performance, or construction of a toy.) ，从句，修饰techniques

中文：这些技术使孩子很难去判断玩具的真实大小、动作、性能以及构造

参考翻译：

英国电视广告的管理者即独立电视委员会批评广告商的“误导”(他们有意或无意营造了一个错误的印象)，他们努力控制广告商对技术的使用，这些技术使孩子很难去判断玩具的真实大小、动作、性能以及构造。

这个句子的主要修饰成分就是从句、非谓语动词、同位语、介词短语，大家务必想清楚，每一个修饰成分修饰的是什么，才能看清楚这个句子的结构。