这个男孩在上小学的时候就初次显示出成为运动员的潜力。The boy first showed promise as an athlete in grade school.孩子们先上幼儿园，然后上学前班，再接着上小学。Children graduate to the kindergarten, then pre-school, and then school.这所小学有多少学生？How many pupils does the schoo...
该酶蛋白含有17种氨基酸, 其中甘氨酸(Gly)和丙氨酸(Ala)为主要氨基酸.The protease includes 17 amino acids , among which, Gly and Ala are dominant amino acids.通过重组SOD技术使失去铜锌离子失活的酶蛋白恢复酶的催化活性.Furthermore, the inactivated enzyme losing metal ion is reac...