【正确答案】:
IT WAS A LANGUAGE IN WHICH THE VARIOUS FORMS OF A GIVEN WORD SHOWED ITS RELATIONSHIP TO OTHER WORDS IN A SENTENCE. 
【题目解析】:内部屈折语是指句子是由词的形式通过变化与别的词发生关系来实现的一种语言。
IT WAS A LANGUAGE IN WHICH THE VARIOUS FORMS OF A GIVEN WORD SHOWED ITS RELATIONSHIP TO OTHER WORDS IN A SENTENCE.