根据下面这个单词进行拼读grade 英[ɡreɪd]美[ɡred]n. 阶段，阶级;等级，级别;标准;班级vt. 安排;依序排列，依等级排列;评估;评分vi. 属于…等级;缓缓地变化或发展[例句]Reading was simply a requirement for progressing from kindergarten to first grade.学会阅读是孩子从幼稚园过渡到一年级的必修课。
支吊架 [词典] [电力] suspension and support; [例句]恒力弹簧支吊架是一种在限定位移内对被支吊物施以恒定张力的装置。Constant force spring hanger is a device which puts invariable tension on the thing it hangs in limited displacement.
