英语词汇“keystone”的意思、释义、用法及双语翻译-时代网

词汇	keystone
释义	noun Changes to the welfare system are the keystone of the government’s reforms.
随便看	mailorder mail orders mail out mail out something mail out sth mails mailshot mailshots mail-slot mail slot mailslot mail something out mail something ↔ out mail sth out mail, the Mail-topic Mail-topic address Mail-topic address Mail-topic addressee Mail-topic addressee Mail-topic aerogramme Mail-topic aerogramme Mail-topic airmail Mail-topic airmail Mail-topic box number 开缺开罗开罪开耳开胃开胃口开胶开脚开脱开脸开腔开腿开膛开航开船开芭开花开花帐开花弹开花结实开花结果开荒开荤开药方开营

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