ratio of grade的意思|示意

Calculation for short columns using Grade Q235 steel tube filled with Grade C30 concrete indicates that the critical diameter to thickness ratio of steel tubes is about 1700.

对Q235钢材、C30混凝土短柱构件的计算结果表明，钢管的最小临界径厚比为1700左右。

Multiple assessments were used to investigate ADHD students of elementary school (1-5 grade). Findings show that the ratio of ADHD in elementary school is about 3.1%.

本研究用运多重评估法（访谈、量表和行为观察相结合） ，对某小学1-5年级学生进行了有关注意力缺损多动障碍（ADHD）的筛查研究。

Longitudinal reinforcement (reinforcement ratio) and the stirrup strength grade contribute little to the improvement of horizontal bearing capacity. It can be collocated by configuration. For R.

加固用纵筋（配筋率）及箍筋强度等级，对结构水平承载力的提高贡献不大，可按构造配置；

We recommend that after 3 months of anticoagulant therapy, all patients with unprovoked PE should be evaluated for the risk-benefit ratio of long-term therapy (Grade 1C).

在3个月抗凝治疗后，所有不明诱因的PE患者都需要进行长程治疗风险-效益比评估（1C）。

The results indicated that only 2 combinations reach three grade quality standards in the 36 indica hybrid rice combinations, the length-width ratio of the 2 combinations were greater than 2.9.

结果表明，36个组合中只有2个组合的稻米品质指标全部达国颁优质稻谷标准3级以上，这2个组合的米粒长宽比都在2.9以上；

Continuously readjusting the grade limit value(classical domain and joint domain) of every factor can maximize the ratio of historical runoff to actual runoff production in a drainage basin.

通过反复调整各因子的等级分界值（经典域和节域），可以使流域产流计算等级和实际等级的拟合率达到最大，其结果比较好。