The researchers used chickens as a model species because, under commercial conditions, chickens will regularly encounter other chickens showing signs of pain or distress due to routine husbandry practices or because of the high levels of conditions such as bone fractures or leg disorders.
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under simulated commercial conditions 在模拟的商品生产条件下
On a SCR denitration test rig, tested was the performance of the catalyst under various conditions and conducted was a comparison with commercial catalysts having a similar structure.
在SCR脱硝试验装置上测试各种条件下催化剂的性能，并与结构类似的商业催化剂进行对比。
Under conditions of modern commercial agriculture, agricultural activities relies on and gives counteractions to the outside ecosystems to a determining extent.
在现代商品农业条件下，农业活动取决于外围生态系统，并在更大程度上对外围系统施加反作用力。
Where commodities, engineering works or services to be procured are not available or cannot be obtained under reasonable commercial conditions within the territory of China;
需要采购的货物、工程或者服务在中国境内无法获取或者无法以合理的商业条件获取的；
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