对转 meaning in Chinese

contra rotating
contrarotate
counter rotation
counterrotation

Consumers , gmos and label : an empirical analysis
对转基因农产品问题的实证分析
Ethical thought of genetically modified food
对转基因食品及其伦理问题的思考
Americans have seemed indifferent to g . m . foods
美国人则不同，他们对转基因食品好像无动于衷。
A new way of simulating the flow field of a lifting rotor in hover
对转式轴流风机内流的数值模拟
Development and safety management of genetically modified food
世界各国对转基因食品的态度和管理

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