Plethora
What you think it means: A lot of something。你以为单词的含义是：很多事物。What it really means: More than is needed。单词的真正含义是：多余。
This is one I use incorrectly all the time. In fact, I almost used it a couple of times in this very article. Plethora simply means that there is more of something than is needed. For instance, you may think that 5,000 people is a plethora of people. However, when you put them into a hockey arena that seats 13,000 people, it’s actually less than half capacity and therefore not a plethora. If you had 13,500 people in that same arena, that would be a plethora of people。这个单词是我总用错的。其实，这篇文章里可能也有几次相关的错误。Plethora是指“再也不需要什么了”。比如，你可能觉得5000人是很多人，但是，如果你把这些人放到能容纳13000人的冰球场，那么人数还不到容量的一半，所以就不能算plethora(多余);如果你把13500人放到那个冰球场，那就是plethora(多余)的了。
