year group短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 年群;年龄组 Methods: The63 cases patients were divided into young group and risky year group. 方法：用对比法将63例急性白血病患者分为年青组及高危年龄组进行对照。 chemyq The school has decided to divide into sets for literacy across the three classes in each year group. 学校决定，将每个年级分为三个等级进行阅读练习。 hadley-china