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....
Later in the evening, Lewis began to croon another Springsteen song.那天晚上晚些时候，刘易斯开始哼唱另一首斯普林斯汀的歌曲。Don't be startled by the smiling, white - haired man who croon " Merry Christmas " to you.当你见到那向你低声哼着 “ 圣诞快乐 ” 面带笑容的白发老...