英语中'whom'这个词是语法化石化的一个例子。
The word 'whom' in English is an example of a ___fossilized grammatical form.
他的教学方法已经僵化，拒绝接受新的教育理念。
His teaching methods have ___fossilized, refusing to embrace new educational ideas.
这些恐龙骨骼在地下被完美地化石化保存了下来。
The dinosaur bones were perfectly ___fossilized underground.
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