但是，由于乙酰丙酸酯主要由葡萄糖或石油基产物转化生产，量少价高，至今未能广泛使用。
However, because of levulinic acid ester is mainly composed of glucose or petroleum-based products into production, less price is high, have been unable to widespread use.
由于乙酰甲胺磷原油的合成技术已经相当成熟，因此，如何改进和优化现有分离提纯工艺成为急待解决的关键问题。
As the synthesis technology of acephate is fairly mature, so how to improve and optimize the separation and purification technology is becoming a key problem hurry to be resolved.
有人推测，神经末梢乙酰胆碱释放减少，使由于这些抗菌素和镁制剂，都能和钙竞争进入通道。
It is postulated that the decreased release of acetylcholine from the nerve terminal reflects a competition of the antibiotic or magnesium with calcium for entry into the terminal.
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