慢速英语:研究人员:怎样让鸡快乐?
日期:2018-12-26
Words in This Story
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fake - adj. not true or real
welfare - n. the state of being happy, healthy, or successful; well-being
frequency - n. the fact or condition of happening often
organic - adj. grown or made without the use of artificial chemicals
track - v. to follow and find (someone or something) especially by looking at evidence
certify - v. to say officially that something or someone has met certain standards or requirements
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