常见例句双语例句This thesis consists of five parts. In the first section, the importance and the progress of studies on oligomeric surfactant are summarized.论文主要包括五部分内容：论文的第一部分概述了低聚表面活性剂研究的意义，并综述了低聚表面活性剂的研究进展。 返回 oligomeric surfactant