back door

基本解释

Or will the required “stress test” act as a back-door route to temporary bank nationalization (the solution favored by a growing number of economists, myself included)?
而那些强制性的“压力测试”是否会成为通往暂时性的银行国有化的后门？
By propping up the region’s weaker banks and buying its more indebted economies’ sovereign debt, the ECB could engineer a back-door bail-out of the euro zone’s periphery.
通过支持区域内居于劣势的银行以及购买更多负债经济体的外债，欧洲央行可以为欧元区的外围设计一个作弊式的应急措施。
Therefore, the Obama administration won't make tough public responses, but will continue to observe and carry out back-door diplomacy by imposing pressure behind the scene.
针对他的举动，奥巴马政府不会公开强硬回应，而是会继续观察并开展悄悄外交，采取幕后施压的方式。
eng.chinamil.com.cn

Indeed, the State Department is running its own back-door appeasement operations with the hated regime.
CENTERFORSECURITYPOLICY: khamenei2
By the early 2000s, many Chinese executives would bristle at the talk of corruption and back-door practices.
FORBES: Understanding China's Leadership Transition
Critics counter that CAFTA will undermine certain U.S. industries and serve as a back-door to more Chinese imports.
CENTERFORSECURITYPOLICY: The national security case for CAFTA

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.
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.

背门
From the results of the static state and the dynamic state analysis, it reflectsthe stress concentration the corner of door plate,and these lead to the problem onthe back door. So we make sure the design of the product is unreasonable.
通过对背门的强度、刚度、模态分析,确定应力集中区域,发现结构刚度薄弱部位,掌握前几阶固有频率,验证结构设计的合理性。
体育
(球穴的)后部，边侧