您要查找的是不是：
- Principal Normal Surfaces of Curves 曲线的主法线曲面
- principal normal surfaces 主法线曲面
- The first principal normal stresses can lead to grinding crack which generates behind the abrasive grain in the plane perpendicular to grain motion. 在磨粒后方，受第一主应力的作用，产生垂直磨削方向的磨削裂纹。
- spherical indicatrix of principal normal 吱线球面指标
- The interval of receiving lines is integral multiple of shot interval. Shoot shots using this kind of system,in theory,there will be only on CMP in each normal surface. 用这种观测系统放炮后 ,在每个标准面元里 ,在理论上只产生一个共中心点 (CMP)。
- My wages are the principal source of my income. 薪金是我收入的主要来源。
- The principal shareholder ask for a meeting. 主要股东们要求召开会议。
- The agent spoke on behalf of his principal. 代理人代表他的委托人说话。
- Keys are available on application to the principal. 向校长申请就可得到钥匙。
- The computer has a normal qwerty keyboard. 这台计算机有标准的英文键盘。
- She's been downgraded (from principal) to deputy. 她已(从校长)降为副校长。
- Our principal problem is lack of time. 我们的主要问题就是缺少时间。
- The situation has returned to normal in the city. 这座城市的局势已恢复正常。
- She drank in every word of the principal's lecture. 她全神贯注地听校长演讲的字字句句。
- The normal return fare to New York is fifty-six. 去纽约的来回票标准价是56元。
- John informed the principal against Paul. 约翰向校长告发了保罗。
- The central or principal vein of a leaf. 中脉中心的或主要的叶脉
- The principal discouraged unexcused absences. 校长不准无故缺课。
- Rubber is the country's principal export. 橡胶制品是该国主要的出口产品。
- Everything is absolutely normal. 一切完全正常。
