首先

First, you have to drain the container of all the old oil.

, 你得从油箱中把所有的陈油都抽去。

One of the first steps taken was the compilation of a report.

采取的步骤之写份。

The formation-types are first rearranged into four major biochores-forest, savanna, grassland , and desert.

把群系型重新排列成四个主要的生态区——森林、稀树草原、草地和荒漠。

Why did you choose basketball in the first place?

你为何选择篮球呢?

First, he had to establish his credentials as a researcher.

，他得证明自己做调查员的资格。

For openers, I don’t think his work is very original.

，我觉得他的作品并无原创性。

They first react with water to produce the silane triol, releasing alcohol as a by-product.

它们可与水反应，产生硅三醇，释放出副产物乙醇。

The content of any article needs, first of all, to be relevant to the reader.

，任何文章的内容都必须适应读者的需要。

The boy justified himself by saying he did not begin the fight.

这个男孩为自己辩护说他没有动手打人。

You have first got to motivate the children and then to teach them.

你得激发孩子的学习兴趣, 然后再去教他们。

German unity depends first of all on the German people.

德国的统靠的德国人民。

A knowledge of her upbringing is basic to an understanding of her books.

要读懂她的书就要了解她的成长经历。

He was above all a good and tireless writer.

他优秀的、不知疲倦的作家。

Plutonium was first discovered in a Berkeley lab (as were the aptly-named berkelium and californium).

铂就在巴克利实验室发现的（确切的名字该叫巴克利姆或加利福利姆）。

Delhi was first and foremost a barracks town.

德里、也主要座军营城。

Chiefly, I ask you to remember to write to your elderly mother.

,我要你记住给你年老的母亲去信。

The first clue is by the famous Italian gastronome Giuseppe Maffioli.

线索来自著名的意大利美食家GiuseppeMaffioli。

The first being a skirt type garment (dhoti), with a blouse (choli) and scarf.

裙子样式的衣服（长裤），还有上衣（露出肚脐的紧身衣）和围巾。

First cut off the water flow from the boiler.

切断来自锅炉的水流。

First, there is speciation (species-splitting or cladogenesis), caused by geographical isolation or some other mechanism.

，因地理隔离或其它些机制导致物种形成（物种分裂或系枝进化）。