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Many students will only memorize chemical equation, but its real meaning is unknown so there will not be any good for learning, so organic mechanism

很多学生只会死记化学方程式，而不明其真正内涵这样对学习不会有任何好处，所以有机化学机理

Previous studies have revealed that the chemosensitive areas of the ventrolateral medullary surface participate in the central chemical regulation on respiration, but the exact location and the mechanism of the central chemoreception are still unknown.

延髓腹外侧表面的呼吸调节化学感受区参与中枢化学感受作用已有许多报道，但经电生理、神经解剖学等多方面的研究，至今尚未找到其化学感受的结构基础，因而其感受机制还不清楚。

In an unknown and extraordinary world!... new Chic icons

在一个未知和非凡的世界里，…新颖别致的图案。

High-pressure trunk-injection of iron fertilizer was reported to be effective to correct chlorosis, but the mechanism involved was unknown.

结果表明，铁肥树干强力高压注射，主要以二价铁(Fe2+)沿中央木质部的导管运输，大部分向下运输，使铁在根中大量贮存；向上运输较少，运输速度为每小时数百厘米，矫正缺铁失绿症的速度比根系输液慢，但由于根中贮存大量的铁，持效期较长。

This silent , unknown choke up then makes it difficult for your target clients to agree to what you are offering as they are distracted by questions in their mind .

这沉默的，未知的呛跟进，然后使人们难以为您服务对象同意什么您所提供的，因为他们是分散的问题，在他们心中。

The chariot procession in temples was some thing unknown during the previous chola/pallava period.

The战车在游行时，不同的是一些未知的事情在过去的佐拉/帕拉瓦时期。

Although IBP was detected in human chondrosarcoma, its function in tumor cells remains unknown.

虽然已经在人类软骨肉瘤中检测到了IBP，但是它在肿瘤细胞中所起的作用仍然未知。

For causes, known or unknown to us, the French begin to chop and hack at each other.

由于我们知道的或不知道的理由，法国人开始互相淹死，互相屠杀。

Mr Van Rompuy, 62, is a Flemish Christian Democrat virtually unknown outside Belgium, who only became prime minister last December.

范龙佩现年62岁，是一位弗拉芒基督教民主主义者，此次当选前在比利时境外声名平淡。

And what was unknown to most of its admirers: it was the world's first water-resistant automatic chronograph equipped with a micro-rotor mechanism.

而且大多数喜欢它的消费者并不知道这些：它是世界上第一个安装了机械微小动子的防水的自动记时器。

Aquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in Lycopodiales.

生活于水中或湿地的蕨类；从新生代生存至今；有时归于石松目之中。

The engine was uprated from a 90hp Franklin to a 125hp Lycoming.

改良过的引擎是从90hp到125hp莱康明富兰克林。