您要查找的是不是：
- 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。
- She's been downgraded (from principal) to deputy. 她已(从校长)降为副校长。
- It is possible to transmute one form of energy into another. 把某种形态的能量改变成另一形态的能量是可能的。
- Our principal problem is lack of time. 我们的主要问题就是缺少时间。
- Young people usually have more energy than the old. 青年人通常比老年人精力充沛。
- The industry felt the effects of the energy crisis. 该工业受到能源危机的影响。
- 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。
- I rallied all my energy for further effort. 我振作精神以做再次的努力。
- John informed the principal against Paul. 约翰向校长告发了保罗。
- Kinetic energy is the energy arising from motion. 动能就是由于运动而产生的能量。
- The central or principal vein of a leaf. 中脉中心的或主要的叶脉
- Solar energy is a new kind of source of energy. 太阳能是一种新型能源。
- The principal discouraged unexcused absences. 校长不准无故缺课。
- It is important to conserve energy. 节省能源十分重要。
- 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。
- Our school gave a reception to our new principal. 我们学校为新校长举行了欢迎会。
