For this, they looked at an organ called the thymus.

为此，他们检查了研究对象的。

Finally, a lot of people with myasthenia gravis undergo surgical removal of the thymus.

最终，许多重症肌无力患者会进行除术。

Adenine will always bind with thymine and cytosine with guanine.

嘌呤总与嘧啶结合，胞嘧啶与鸟嘌呤结合。

There are four bases: adenosine, thymine, cytosin, and guanine.

苷、嘧啶、胞嘧啶和鸟嘌呤。

Ten-second trivia: The thymus, the spleen, and bone marrow are all important parts of what?

、脾脏和骨髓都人体哪一系统的重要组成部?

Now, T-cell development starts in the thymus from precursors that arise in the bone marrow.

现来看T细胞，它们由从骨髓中产生的前体T细胞中发育而来。

Usually, our thymus makes sure that the T-cells that attack these self proteins aren't allowed to survive.

一般情况下，我们的灭活这些攻击自身蛋白的T细胞。

The tissue came from another person's thymus gland and was partly grown in a laboratory.

该组织来自另一个人的，某种程度实验室中培养出来的。

RNA has a base, uracil, or U, whereas DNA has the base thymine or T.

RNA 的碱基尿嘧啶（U），而 DNA 的碱基嘧啶（T）。

The Nitrogenous bases are of four different types: Adenine, Guanine, Cytosine and Thymine.

含氮碱基有四种不同的类型：嘌呤、鸟嘌呤、胞嘧啶和嘧啶。

But Duke University waited to announce the operation until after doctors learned whether the thymus implants were working.

但杜克大学一直等到医生知晓植入物否起作用后才宣布这一手术。

About two weeks later, he had a second operation to implant the processed thymus tissue.

大约两周后，他进行了第二次手术，将经过处理的组织植入。

First, surgeons implanted his new heart while the donated thymus was sent to a laboratory.

第一次手术，外科医生为他移植了新的心脏，同时捐赠的被送往实验室。

Some babies are born without a thymus, which helps in development of part of the immune system known as T cells.

有些婴儿出生时没有，而有助于免疫系统中被称为T细胞的部的发育。

However, in this study, the T-cell production by the thymuses of the cyclists had not slowed down with age.

不过, 这项研究中, “骑行队”的T细胞生成并没有因年龄增长而放缓。

His own partly working thymus was removed so that new immune cells can develop.

他自己部工作的被除，这样就可以产生新的免疫细胞。

The thymus makes immune cells called T-cells.

产生称为 T 细胞的免疫细胞。

Starting at about the age of 20, the thymus of most people starts to get smaller.

大约从 20 岁开始，大多数人的开始变小。

The rules of base pairing dictate that adenine always pairs with thymine, and cytosine always pairs with guanine.

碱基配对规则规定嘌呤总与嘧啶配对，胞嘧啶总与鸟嘌呤配对。

Another piece of evidence scientists look at is the presence of a metapleural gland that most ants have today.

科学家们关注的另一项证据今天大多数蚂蚁都拥有的后。