目的是探讨 CT 导向下经皮穿刺注入硬化剂的临床疗效。
The objective is to evaluate the clinical value and method of percutaneous intradiscal and injection of sclerosant.
经五步反应合成得到磺酰脲类除草剂玉嘧磺隆。
Sulfonylurea herbicide Rimsulfuron was synthesized by a five-step reaction.
疟疾可以通过经杀虫剂处理的保护性蚊帐加以预防，这些蚊帐可以防止蚊子叮咬儿童。
Malaria can be prevented by the use of protective nets treated with insecticide that prevent mosquitoes from biting a child.
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