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- The ratio of students to teachers is 35:1. 学生和老师的比率是三十五比一。
- Through the wind tunnel tests, this paper investigates the characteristics of wind-induced instability of the H-shape hangers with different perforating ratios of their webs. 摘要通过风洞试验，研究了不同腹板开孔率的H形吊杆风致失稳特性。
- The ratio of schoolboys to schoolgirls is 2 to 1. 男学生和女学生的比例是2比1。
- Men outnumber women here in the ratio of three to one. 此地男子数量以三比一超过女子。
- The first or last term of a ratio or a series. 首项，末项比率或数列中第一个或最后一个项
- perforation ratio 开孔率
- A perforation,as in a punched card or paper tape. 在穿孔卡片或纸带上穿孔的一种动作。
- the technique parameters assembly range of water-controlled partial wetting irrigation was:the suitable perforation ratio is about 14%,the submergence height is 7-9 cm,and the irrigation low limit is above 70%. 局部控水浸润灌溉合理的技术要素组合为:淹没高度为7-9 cm,适宜开孔率为14%25左右,灌水下限不低于70%25田间持水率。
- A perforation, as in a punched card or paper tape. 在穿孔卡片或纸带上穿孔的一种动作。
- An ornament inserted into a perforation in the lip. 唇饰穿在唇上的孔里的一种饰物
- This prevents bowel perforation. 这样可以防止肠道穿孔。
- The acute Perforation has developed. 发生急性穿孔。
- After-tax profit margin is the ratio of net income to net sales. 税後利润率指净收入与净销售之比。
- A mark or a perforation indicating canceling. 取消记号表示取削的标记或孔洞
- The ratio of men to women was two to one. 男女的比例是二比一。
- The perforation in tectum is clear. 覆盖层不连续,有小穿孔。
- The perfor mance indexes thereof are tested. 检测了该醇酸树脂的各项性能。
- Mesh sizes 16 and 32 are perforation cartridges. 网孔规格尺寸16和32是穿孔筒。
- The interval between any two frequencies having a ratio of2 to1. 倍频程频率比率为2比1的两个频率的间隔
- No bleeding, perforation or septicemia occurred. 未发生出血、穿孔、败血症。
