He is the principal of this school.

他该学校的校长。

A spitball hit the principal on his nose.

一个纸团飞过来打在校长的鼻子上。

Their school gave a reception to their new principal.

他们学校为新校长举办了一个招待会。

Drinking is a principal cause of highway deaths.

公路死亡事故的最的原因。

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。

The two principal political parties have combined to form a government.

两个政党已经联合起来组成政府。

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.

有争议的问题牵涉到将来条约的期限。

The principal of acceleration relativization and the principle of force relativization was deduced.

推导出了加速度相对性原理和力相对性原理。

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."

"一旦抓住了盾,一切问题就迎刃而解。"

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

他政界一个有权有势的人物。

The judge examined the principal witness.

法官询问了证人。

There is a shortage of principal.

资金有些短缺。

The reaction principal, reaction procedure and flowsheeting in the potassium sulfate method are included.

给出了甲酸钠法的反应原理、反应过程以及工艺流程。对原料消耗、产品规格及质量测定作了简单介绍。

It is always one of our principal policies to develop agriculture in a big way.

大力发展农业一直我们的方针之一。

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

缺陷营养生物除需碳源外，还需一种或几种有机养料。

Methazolamide eye drops was prepared using inorganic nanoparticles as carrier and methazolamide as principal agent.

制备醋甲唑胺滴眼液并建立其质量控制方法。

A Deployer maps roles to security identities (for example principals, and groups) in the operational environment.

配置信息映射角色到操作环境中的安全特征（比如负责人和团体）。