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现代研究,尤其是五十年代以后,欧美科学家把兴趣主要放在水蛭活性成分上,至今研究最深入、收效最大的是水蛭素(hirudin)。到目前为止,从水蛭中分离出来的活性成份,其大致可以分为两类:一类是直接作用于凝血酶系统的成分,包括凝血酶抑制剂以及其他抑制血液凝固的物质,这或许就是水蛭
In modern research, especially after the 1950s, European and American scientists focused their interest mainly on the active components of leech, and hirudin has been the most in-depth and most effective research ever since. So far, the active ingredients isolated from leeches can be roughly divided into two categories: those that directly affect the thrombin system, including thrombin inhibitors and other substances that inhibit blood clotting, which may be blister.