Q: What was the method of measuring children's growth before?
问：以前儿童生长的衡量方法是什么？
Q. Should I create another interface for this or just stick with the abstract method?
问：我应该创建这个或另一个接口只抽象的方法？
Q vector is taken as an effective method to estimate vertical motion.
Q矢量被视为估算垂直运动的有效方法。
Q vector is taken as an effective method to estimate vertical motion.
Q矢量被视为估算垂直运动的有效方法。
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