The results show that the surfactants added and the surface active substances from effect the losser.结果发现除了一般的浮选条件以外,废纸浆中的表面活性剂和来自废纸的表面活性物质与浮选损失有着重要的关系....
They were tidying up the remains of their picnic.他们正在收拾野餐后剩下的东西。I really must start tidying the place up.我真得开始收拾收拾这个地方了。You would be better employed tidying your room.你最好打扫一下你的房间....