试题题干
Complete the following statements with proper words or expressions according to the course book.
Observation shows that it is much more common for word meanings to change in denotation from 
to pejorative than it is for them to go the other way.
参考答案
试题解析
观察表明，词义在外延上由中性向贬义转变的现象比相反的情况更为普遍。