粉笔 chalk
骑士 cavalry
跨越 straddle
审判(动词和名词)try trial
以月为基础 on a mothly basis
退休(名词) retirement
约束力bunding force binding contract
卷饼 burrino
借记卡 debit card
学者 scholar /academics
科目subject discipline
移动支付 mobile payment
过时 obsolete
初创企业 start-up
商家 merchant
安全威胁 security threat
缩影;象征(名词和动词)classic case / symbol/ symbolize /stand for epitome―― epitomize
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