临时仲裁，英文表达为As hoc arbitration或Interim arbitration，临时仲裁是19世纪中叶机构仲裁出现以前惟一的国际商事仲裁组织形式，临时仲裁比机构仲裁（管理式仲裁）历史悠久。

在常设仲裁机构发展迅速，数量达到130多个的情况下，临时仲裁仍有很强的生命力，得到很多国家的承认，特别在国际海事的纠纷处理方面，临时仲裁是主流。

机构仲裁，英文表达为Institutional arbitration，机构仲裁是指当事人根据仲裁协议，将纠纷提交给约定的某一常设仲裁机构所进行的仲裁。

仲裁机构可帮助指定仲裁员；中国不允许在仲裁员名册以外选定，但有的国家可以。仲裁机构为仲裁员提供工作便利，保证仲裁顺利进行。

临时仲裁与机构仲裁的区别：

临时仲裁是当事人根据仲裁协议，将他们之间的争议交给临时组成的仲裁庭而非常设性仲裁机构时进行审理并作出裁决意见书的仲裁。机构仲裁是当事人根据其仲裁协议，将它们之间的纠纷提交给某一常设性仲裁机构所进行的仲裁。

仲裁机构的费用有明文规定，具明确性；临时仲裁往往需谈判费用，当事人无丰富经验。

参考双语例句：

China’s reference to Section 2 refers to the UNCLOS provisions stating that disputes will be solved through one of four venues: the International Tribunal for the Law of the Sea, the ICJ, ad hoc arbitration, or a “special arbitral tribunal” constituted for certain categories of disputes.

中国有关第二节的引述指的是《联合国海洋法公约》条款中规定通过下列四种途径之一争端解决：国际海洋法法庭，国际法庭，临时仲裁和针对某类争端的特别仲裁法庭。

These amendments are particularly important because, while the 2005 elections were conducted under the Accra Comprehensive Peace Agreement that suspended parts of the Constitution and established ad hoc arbitration mechanisms, the 2011 elections will be conducted in full accordance with the Constitution.

这些修订案特别重要，因为 2005 年的 选举是根据《阿克拉全面和平协议》举行的，该协议中止了部分《宪法》并设立了临时仲裁机制，但是，2011年的选举将完全依照《宪法》举行。

The benefits of having an international dispute settlement institution as the neutral entity are the following: (a) such an institution would provide access to existing expertise in administering all aspects of arbitration proceedings; (b) such an institution, selected through a competitive procurement exercise, would reflect the commercial nature of the underlying contract; and (c) having an outside institution administer the arbitration would de-link the neutral entity from the Organization and eliminate any perception of partiality.

由一个国际争议解决机构担任中立实体的好处如下：(a)这样的机构能提供管理仲裁程序各方面的现有专长；(b)通过竞争性征聘方式选择这样的机构，能体现存在争议的合同的商业性质；(c)由一个外部机构来管理仲裁可以确保中立实体与本组织无关，避免产生偏袒的看法。

The ICCA publishes a Yearbook which provides an annual update on key developments in the Arbitration world, including: institutional and ad hoc arbitral awards, court decisions on arbitration from around the world, court decisions on major multilateral arbitration conventions, commentary on the court decisions on the New York Convention, updates on developments in arbitration law and practice, an investment treaty awards and decisions digest and a bibliography of the latest texts.

国际商事仲裁理事会出版一份年鉴，介绍每年仲裁界主要动态最新情况，其中包括：机构仲裁裁决和特别仲裁裁决、世界各地关于仲裁的法院判决、关于主要多边仲裁公约的法院判决、关于《纽约公约》方面法院判决的评注、仲裁法律和实践方面的最新发展情况、投资条约裁决和判决摘要，以及最新法规的书目。