有四种

Scientists say that seventy-four different kinds of living things go extinct every day!

科学家说每天有七十四种不同种类的生物灭绝！

Middle School basketball player of the survey found that the use of self-suggestion and relaxation training, imagined training, focus on training, simulated game situations in four psychological training methods of training athletes to improve performance significantly.

通过对中学篮球运动员的调查发现运用自我暗示和放松训练、想象训练、集中注意力训练、模拟比赛情境训练四种心理训练方法对运动员的成绩有明显的提高。

Accurately speaking, that means is to construct agriculture catastrophe insurance risk management institution by using own fund, exterior fund, reinsurance and agriculture catastrophe insurance securitization.

在分析和评价四种技术的基础上，提出了农业巨灾保险风险分散管理的策略：自有资本要稳健发展，外来资金要鼓励发展，再保险应积极发展，证券化应该有条件地发展。

The most well-known species is the red-bellied piranha, but there are nearly forty other different species of piranha.

最出名的种群是红肚水虎鱼，但其实大约有四十种不同类型的水虎鱼。

Van't Hoff and Joseph-Achille Le Bel (1847-1930) had independently explained in 1874 how a molecule with a carbon atom bonded to four different groups has two mirror-image forms.

范托夫和贝勒于1874年分别独立地解释了与四个不同的基团结合的碳原子所组成的分子如何有两种互为镜像的形式。

Except cellulose acetate fiber,the strength of other four-kind fibers in completely dry state is decreased notably after MHT.With the initial moisture regain increased,the breaking elongations of cotton,rayon and loycell are improved remarkably after MHT.The increasing level is rayon＞loycell＞cotton,but ramie seems little improved.As the moisture regain is low,the fiber initial modulus is enhanced.However,when the moisture regain is higher,the fiber initial modulus did not change obviously.

除了醋酸纤维素纤维，其余四种纤维在初始回潮率为0的时候，经过微波处理，纤维强度都是显著性下降的：随着初始回潮率的增大，棉纤维、粘胶、天丝的断裂伸长率有了显著性的提高，其中升高的幅度为粘胶＞天丝＞棉纤维，苎麻没有显著性提高；在回潮率较小的范围内，微波处理之后纤维的初始模量是增大的，随着回潮率的增大，初始模量变化不显著。

Important conclusions are:(1) There are four types of information needs for image data: implicit, inspirational, everchanging, and purposive. The types of needs may change during the retrieval process.

分析所得资料后，比较重要的结论归纳如下：(1)影像资讯的需求模式有隐藏式、激发式、变动式、目的式四种，且需求模式会随著寻求的过程而改变。

A low elliptical or pointed arch; usually drawn from four centers.

一种很低的椭圆拱或尖顶拱；通常有四个中心点。

Only four types of people end up on Hollywood's sidewalks--runaway teens, celebrity impersonators, tourists, and entertainment superstars.

目前只有四种人能走上好莱坞的星光大道：流浪的年轻人，有名望的名人，游客，还有娱乐圈著名明星。

As befits a nation originally settled by misfits, con-victs, adventurers, and religious fanatics (a demo-graphic mix that has changed hardly at all in nearly 400 years), the United States retains a strong flavour of intransigent noncooperation.

最初来到这片土地的是一些不适应环境的人、罪犯、冒险家和宗教狂热分子(将近四百年来，这种群体构成几乎没有什么变化)。与此相应，美国有一种强烈的绝不合作的气氛。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。