精炼是否refinery ，如原油要经过精炼才可用。真那么难？

来源: akc 于 2023-02-16 12:17:07 [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.