(cleaner, cleanest) free from harmful or unpleasant substances无有害物的；清洁的◆clean air/water清洁的空气／水◆the search for cleaner technologies寻找更清洁的技术➡green not showing or having any record of doing sth dishonest or against the law无犯罪记录的；守法的◆He is hoping to maintain the company's clean record on safety.他希望保持公司无违反安全的记录。◆(NAmE) a clean driver's license无违章记录的驾驶执照 () financially strong; having little or no debt财力雄厚的；债务少的；无债务的◆The firm has a strong cash flow and a clean balance sheet.公司拥有充裕的现金流和负债少的资产负债表。◆They are the country's biggest and cleanest bank.他们是这国家最大、资产最雄厚的银行。●a clean bill of ˈhealtha report that says sth is reliable, safe or in good condition合格证明书◆The auditors gave the company a clean bill of health.审计人员给公司出具了一份营运状况稳健证明书。●clean ˈhandsif sb has clean hands they are not guilty of any illegal or dishonest acts（某人）清白的◆The bank is in crisis and needs a leader with clean hands.银行正处于危机之中，需要一个清白正直的人做领导。➡clean bill of lading at bill of lading