To find out whether the memory loss was permanent, researchers gave the mice a drug that, in effect, reduced the amount of the enzyme to normal levels.
为了查明这些记忆是不是永久的失去了，研究者们给了这些老鼠一些药以将酶的数量降低到正常水平。
2
Melanoma cells and its patterns are normal, but congenital enzyme tyrosine sharp reduction or lack of, with the result that should not have caused melanoma.
它的黑色素细胞与形态都是正常的，只是先天性酷氨酸酶尖性减少或缺乏，致使不能产生黑色素所引起的。
3
Methods: We examined and observed 52 patients with typhoid and 20 normal controls by bacterial culture, Widal reaction, and enzyme-linked immunoassay for detection of typhoid bacilli H antigen.