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- 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。
- Principal Normal Surfaces of Curves 曲线的主法线曲面
- spherical indicatrix of principal normal 吱线球面指标
- 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。
- normalized complex wave amplitude 归一化复数波振幅
- The situation has returned to normal in the city. 这座城市的局势已恢复正常。
- Our principal problem is lack of time. 我们的主要问题就是缺少时间。
- The normal return fare to New York is fifty-six. 去纽约的来回票标准价是56元。
- 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。
- 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。
- Everything is absolutely normal. 一切完全正常。
- Rubber is the country's principal export. 橡胶制品是该国主要的出口产品。
- The principal has a very tight schedule. 校长的日程表排得满满的。
