formation backgrounds 基本例句 形成条件 Formation of polymeric deposit was investigated in methane conversion by microwave plasma.摘要考察了微波等离子体甲烷转化反应中积炭的形成条件。 Analysis of the formation conditions for etching Al film of electrolytic capacitors.电容器铝箔交流腐蚀过程中腐蚀膜形成条件分析。