用词恰当 meaning in English

use proper words

In fact , as long as one can use grammar correctly and diction properly , that is to say , to express one ' s idea faultlessly , the untypical pronunciation ( attention : it is untypical rather than wrong . ) makes no block to the communication
其实，只要能做到语法正确，用词恰当，也就是能正确表达，发音不地道（注意，是不地道，不是错误）根本就不妨碍交流。