There was a trace of exasperation in his voice.他的声音听上去有些愤怒。Mahoney clenched his fist in exasperation.马奥尼恼怒地攥紧拳头。He snorted with exasperation.他愤怒地哼了一声....
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....