back door

柯林斯词典

1. ADJ You can use backdoor to describe an action or process if you disapprove of it because you think it has been done in a secret, indirect, or dishonest way. 不正当的[ADJ n] [表不满]
Firms are using the programme as a backdoor way to replace domestic employees with cheaper labour. 公司正采取不正当的策略，用廉价劳工来取代本土员工。
Critics say this amounts to a backdoor amnesty for illegal aliens. 评论家认为这等于是对非法移民的变相特赦。
2. N-SING If you say that someone is doing something through or by the backdoor, you disapprove of them because they are doing it in a secret, indirect, or dishonest way. 不正当、秘密的手段['the' N, usu prep N] [表不满]
The government must not use this initiative as a means of resolving the pension problem through the back door. 该政府绝不可使用这种方式，采取不正当的措施解决养老金问题。