短語詞組短語pragmatic fossilization 減少語用石化Interlanguage fossilization 中介語石化group fossilization 群體石化individual fossilization 體石化;分為個(gè)體僵化-fossilization 固化fossilization barrier 石化篩選作用growth fossilization 成長斷軸oral fossilization 口語僵化permanent fossilization 永久性石化 返回 fossilization