This paper studies ultrasonic esterification, it was found that, esterification with ultrasonic ware has method simplification, condition tempered and yield high, which is a significant way.
报导了超声酯化反应的研究结果。研究发现，在超声辐射下进行酯化反应。方法简单，条件温和，产率高，是一种值得注意的新方法。
Conclusion: The new method has several advantages such as cheap reactants, facile reaction condition, convenient operation and high yield.
结论：新工艺原料价廉易得，反应条件温和，后处理简便，收率高。
The study indicates that the effect of summer corn water saving and yield increasing is obvious evident which is theoretical base of crop high yield under the water saving condition.
研究结果表明：秸秆覆盖条件下夏玉米节水和增产效果明显，并为节水条件下的作物高产提供了理论根据。
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