a phase transfer catalyst可以翻译成单相移动催化剂吗？
算了，证据都敲上去吧：the pretreatment is effective when the usd oilis mixedat moderate temperatureswith small acount of certain alkline in the presence of a phase transfer catelyst
the pretreatment is effective when the usd oilis mixed at moderate temperatureswith small acount of certain alkline in the presence of a phase transfer catalyst
此项预处理， 即让废油在室温条件下与少量的碱和相转移催化剂混合，是有效的。
贴主难道做的是地沟油的营生？？！ 伤天害理
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