[] () used to show that a company or government has a low credit rating or that there is a lot of risk involved in buying their bonds垃圾债券（指公司或政府的信用评级低或购买其债券有很大的风险）◆The company's long-term debt is now rated as junk. 这公司的长期债务现在被评为垃圾债券。◆Moody's dropped its rating on the firm to one grade above ‘junk’ status.穆迪将这公司的信用评级降到“垃圾级”的上一级。◆a junk-rated company垃圾级公司➡investment-grade used to describe sth that is of little value无价值的东西◆There's so much junk in my office!我办公室里有这么多废物！◆filtering out junk email(= emails advertising sth, sent to people who have not asked for them)过滤掉垃圾邮件➡junk mail