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1·He's travelled widely, chiefly in Africa and Asia.

他游历了许多地方，主要在非洲和亚洲。《牛津词典》

2·We are chiefly concerned with improving educational standards.

我们主要关心的是提高教育水平。《牛津词典》

3·He joined the consular service in China, chiefly because this was one of the few job vacancies.

他参加了驻华领事馆的工作，主要是因为这是为数不多的几个空缺职位之一。《柯林斯英汉双解大词典》

4·It relies chiefly on mineral export.

它主要依靠矿物出口。

5·The World Cup is also chiefly responsible for sleep deprivation.

世界杯也是造成睡眠不足的主要原因。

6·The materials chiefly used in modern papermaking are cotton or linen rags and wood pulp.

现代造纸中主要使用的材料是棉布或亚麻布和木浆。

7·The materials chiefly used in modern papermaking are cotton or linen rags and wood pulp.

现代造纸中主要使用的材料是棉布或亚麻布和木浆。

8·The man chiefly responsible for the German forward units was General Hasso Baron von Manteuffel, who commanded the Third Panzer Army.

德国前线部队的主要负责人是哈索·冯·曼陀菲尔将军，他指挥着第三装甲部队。

9·Although she is remembered today chiefly for her innovations in stage lighting, her activities also touched Isadora Duncan and Ruth St.

虽然今天人们主要因为她在舞台灯光方面的创新而记住她，但她的活动也感动了伊莎多拉·邓肯和露丝·圣。

10·While Pierre Curie devoted himself chiefly to the physical study of the new radiations, Marie Curie struggled to obtain pure radium in the metallic state.

当皮埃尔·居里主要致力于新放射物的物理研究时，玛丽·居里却在努力提取金属态的纯镭。

主要地

1·What the landlords and the nobility exacted from them in the form of land rent was also chiefly for private enjoyment and not for exchange.

地主和贵族对于从农民剥削来的地租，也主要地是自己享用，而不是用于交换。

首要

1·No that it is solely, or chiefly, to form great thinkers that freedom of thinking is required.

毫不奇怪，要造就伟大的思想者，自由的思想是唯一的、首要的、必需的条件。

2·The cargo trade is the very important part of international trade, and the chiefly problems to be solved for CAFTA.

货物贸易作为国际贸易中的重要组成部分，也是中国-东盟自由贸易区建设需解决的首要问题。

3·In the message transferring model, parallel program design chiefly consider the decomposition of computing problem.

在消息传递模型中，并行程序设计的首要考虑是计算问题的分解。

4·So in this situation, it is the chiefly matter for the enterprise to get hold of the opportunity to expand in high quality and to improve its competitive ability and its development potential.

在此情况下，房地产企业如何抓住机遇进行快速和有质量的跨区域扩张，提高企业竞争能力和发展潜力，已成为企业亟待解决的首要问题。

5·So as to mathematic teaching, requiring students study overpass their thinking, this is chiefly leaching aim and request of liberal education.

在数学教学中，要求学生通过自己的思维来学习，这是普通教育首要的教学目的和要求。

首先

1·Although HS2 seems to have a positive cost-benefit ratio, there are other projects, chiefly in roadbuilding, that would provide a better return.

虽然，HS 2项目的成本效益比似乎比较积极，但另外一些项目，首先在筑路这块就将提供一个更好的回报。