Spinach, is in fact, one of the most nutritious vegetables.请问老师：is in fact 这里前后都使用逗号，看不懂，为什么这样使用呢？好像一般都是Spinach is, in fact, one of the most nutritious vegetables. in fact做插入语。
...om the pain, music, people say, can
lower stress and anxiety levels. This, of course, can lead to less pain.翻译：一些专家说，如果音乐的声音太大，它可能是有害的。然而，出于同样的原因，如果一个人处于痛苦中，（大声的）音乐则可能非常有益。...
A string of accidents, including the partial collapse of a cooling tower in 2007 and the discovery of an underground pipe system leakage, raised serious questions about both Vermont Yankee's safety and Entergy's management especially after the company made misleading statements about the pip...
...单数还是复数？Cusco is a popular destination for tourists, because of its unique
place in the history of South America. Cusco was the capital city of the Inca
Empire which was the most powerful in South America until the 1500s. There are
two especially interesting things to admire about the I...
The Greeks believed that the earth was composed of four elements, and the heavens of a perfect crystalline material.这句话涉及并列句的省略，在heavens后面省略了was composed，这是怎么判断出来的？
The store sells different kinds of drinks/drink ?是drinks还是drink呢？drinks：不可数名词复数已经表示了种类，为什么还要再加kinds表示种类呢？为什么不可直接说different kinds of drink呢？麻烦老师解释一下，谢谢！
But the idea that the journalist must understand the law more profoundly than an ordinary citizen rests on an understanding of the established conventions and special responsibilities of the news media.这里后面的rests on的宾语是谁和谁并列呢？判断的依据是什么呢？
The less the surface of the ground yields to the weight of a
fully-loaded truck, ____ to the truck.A. the greater stress is B.
greater is the stress C. the stress is
greater D. the greater the stress