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OG8题目中
Lacking information about energy use, people tend to overestimate the amount of energy used by equipment. such as lights, that are visible and must be turned on and off and underestimate that used by unobtrusive equipment, such as water heaters.
超级菜鸟总结中提到“that are是限定定语从句，不可能修饰lights的，只能修饰equipment, such as lights 是插入语-托福语法”。不知道对这个解释应该如何理解？
that are真的不能修饰lights？ | 
