名词
中文翻译：背书
同义词：
['certificate of endorsement', 'letter of approval', 'recommendation例句：1. The company issued a letter of endorsement to the new hire.（公司向新员工颁发了背书。）']
例句：
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1. The company issued a letter of endorsement to the new hire.
公司向新员工颁发了背书。
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2.She requested a letter of endorsement from her supervisor.
她要求她的上司给她一份背书。
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3.The bank required a letter of endorsement before approving the loan.
银行在批准贷款之前要求一份背书。