Partial derivative to zero偏导函数为零

partial oxidation to syngas部分氧化制合成气

partial shipment to be prohibited禁止分批装运

partial oxidation to synthesis gas部分氧化制合成气

partial shipment to be allowed允许分批装运;分批装运

partial oxidation to produce hydrogen部分氧化制氢

methane partial oxidation to syngas甲烷部分氧化制合成气

Partial to dark brown局部为深褐色