One day before the college entrance examination, a TV station made a report about the college entrance examination, entitled "All localities provide convenience for students to take the college entrance examination". After the lecture, a reporter said, "I wish all the students good grades." In these two sentences, the usage of "many students" is wrong. Why?

Because "student" is a freely combined word, it is not an idiom at all. "Shen Xin" is just an overlapping adjective, and "numerous" is its meaning, which is widely used in ancient Chinese. For example, the sentence quoted by Shi Zhouguo Yu is "I am eager to recruit a husband, and I am invincible." The word "numerous students" is often used to describe the large number of students in Modern Chinese Dictionary, so the word "numerous students" comes into being.

In addition, attention should be paid to the pronunciation of "Shen Xin". "Shen Xin" should be pronounced as shēnshēn, but people often mispronounce it as X, nx and N. Although "Xin" is pronounced as xοn, it appears as a surname, a place name or a plant name.

"Shen Xin" itself means "numerous". If quantifiers are added before it to modify it, such as "vast", "many" and "every", the meaning will be repeated, which is a logical mistake in grammar.