During emissions testing, the cars' pollution controls systems were turned on, curbing toxic emissions at the cost of engine performance.

在排放检测中，车辆的污染控制系统会被打开，遏制发动机性能，削减有毒物质的排放。

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The central competent authority in consultation with the relevant agencies shall determine regulations for the irregular air pollutant emissions testing of in-use motor vehicles.

使用中汽车排放空气污染物不定期检验办法，由中央主管机关会商有关机关定之。

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Meanwhile, China is preparing to introduce a new set of emissions testing standards, with tougher limits on exhaust gases such as nitrogen oxides, which cause respiratory diseases.

与此同时，中国正准备推出一套新的排放测试标准，更严格地限制氮氧化物等尾气的排放——氮氧化物等尾气会引发呼吸系统的疾病。

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Vehicles will be prohibited from idling their engines for more than three minutes if parked near a school or a hospital, and cars will be subject to random testing for emissions compliance.

CNN: Beijing tries to clean up its act

Because of its direct kinship, the Destino can piggyback on the Corvette's emissions certification as well as the Karma's crash-testing data, since none of the car's load-path structure has been altered.

WSJ: VL Destino: The Detroit Show, and the Only Car That Matters | Rumble Seat by Dan Neil

The testing required to demonstrate that a novel engine can meet stringent emissions standards and durability requirements is expensive and time consuming.

WSJ: How to Make Better Car Engines