He is the principal of this school.

他是该学校的校长。

A spitball hit the principal on his nose.

一个纸团飞过来打在校长的鼻子上。

The teacher conferred with the principal about Dick's promotion.

教师与校长商谈了迪克的升级问题。

The principal spoke with disapproval of your words and actions.

校长谈到你的言行时很不赞成。

There was no school play because the principal withheld his consent.

由于校长没同意, 学校里没有举行比赛。

The principal issues in dispute concern the duration of the future treaty.

有争议的主要问题牵涉到将来条约的期限。

The judge examined the principal witness.

法官询问了主要证人。

Hydrous desmocollinite and exinite in coal are the principal material for hydrocarbon generation.

另外，本文提出了煤的有机地化参数类比系数法，并对煤生烃潜力进行了评价。

"Once the principal contradiction is grasped, all problems will be readily solved."

"一旦抓住了主要矛盾,一切问题就迎刃而解。"

He is one of the principal movers and shakers in the political arena.

他是政界一个有权有势的人物。

An auxotroph requires, in addition to the principal carbon source, one or more organic nutrients.

缺陷营养生物除需要主要碳源外，还需要一种或几种有机养料。

The day before my graduation from Soldan High School in St.Louis, the principal called an assembly.

"我们从St Louis的Soldan高中毕业的前一天，校长召集我们集中。

Burma (Myanmar) and Guatemala are the principal sources of modern gem jadeitite, and Canada of modern lapidary nephrite.

缅甸和危地马拉是现代翡翠的主要产地，而加拿大是现代宝石的主要产地。

The principal of wavelet denoising is introduced and the replicability of GPS multipath effect in dynamic environment is discussed firstly.

介绍了小波滤波去噪的原理并讨论在动态环境下GPS多路径效应的重复性问题。

Furthermore, Qianlong modified the meltage-fee system enforced by Emperor Yongzheng, reducing the rate from 30-50% (of the principal taxes) to 10%.

其次，乾隆皇帝更改雍正皇帝所订火耗制度，火耗佔正额比例由30%至50%降为10%。

Lictors were organized in an ordered line before him, with the primus lictor (the principal lictor) right on his front, waiting for orders.

他们跟随著长官，不论他走到那里，包括中枢区，他的房屋，神殿与浴室。

If the delegation of authority to the subagent is not authorized, the principal is not liable to third persons for any act or contract of the subagent.

如果代理人对复代理人的委托未经授权，本人对复代理人的任何行为或所订立的合同都不对第三人承担责任。

The principal prupose of this study is on nanosizing the disperse dyestuffs to colourize the fabric made of polyester super-micro fibers and to improve its dyeing properties.

摘要本研究主要是以分散性染料染超微细聚酯纤维，以一般粒径染料与细化至奈米粒径染料染色之比较，针对坚牢度测试与上色程度来分析。