These rivers and river systems are known as "exogenous" because their sources lie outside the arid zone.

这些河流和河川系统被称作“外源河流”，因为它们的源头位于干旱地区之外。

Exogenous quinolinic acid is endowed with quite evident anti-inflammatory effects on either acute or subacute models.

外生喹啉酸对急性和亚急性炎症有明显的抗炎作用。

Disorders of old age are generally not exogenous.

老年疾病通长都不是起于外因的。

Exogenous nucleotides; Serum uric acid; Renal injury.

外源核苷酸；血清尿酸；肾脏损伤。

At the same time, the safety of exogenous hormones was discussed.

同时对外源激素本身的安全性进行了探讨。

Exogenous variables can include lagged values of endogenous variables.

外生变量可以包括内生变量的后滞值。

An exogenous shock to exports will lower the equilibrium output of the economy.

一个外来的出口冲击会减少经济体的均衡产出。

Objective: To study the effects of exogenous nucleotides on immune function in mice.

目的：本实验研究了日粮核苷酸促进免疫抑制小鼠的免疫功能恢复的作用。

Every model includes exogenous and also endogenous variables which must be estimated.

每一个模型都包括需要估计的外生变量和内生变量。

The exogenous gene expression was analyzed by indirect immunofluorescence assay (IFA).

采用间接免疫荧光法(IFA)检测外源基因的表达。

We don garment after garment, as if we grew like exogenous plants by addition without.

我们穿上一件衣服又一件，好像我们是外生植物一样，靠外加物来生长的。

The large intestine does not play a major role in the absorption of exogenous phosphorus.

大肠对外源磷的吸收不起主要作用。

The expression of exogenous genes were analyzed by indirect immunofluorescence assay (IFA).

采用间接免疫荧光法(IFA)检测外源基因的表达。

Conclusions Exogenous reinfection was a major cause of tuberculosis recurrence in Shanghai.

结论外源性再感染是上海地区结核病复发的重要原因；

Objective To investigate the effect of exogenous manganese intoxication on rat hippocampus.

目的：研究外源性锰中毒对大鼠海马的影响。

The institutional change is the coefficient result of exogenous variable and endogenous variable.

制度变迁的产生是外生变量和内生变量共同作用的结果。

Exogenous applications of indoleacetic acid, kinetin or gibberellic acid stimulate photosynthesis.

吲哚乙酸，激动素或赤霉酸的外源施用刺激了光合作用。

An exogenous variable is a variable that is not explained by the model but rather is taken as given.

外生变量是模型本身不予以解释而是当成已知的变量。

Objective To investigate the protective effect of exogenous Epidermal Growth Factor (EGF) on neuronal damage.

目的观察神经损伤后外源性表皮生长因子（EGF）对神经元保护的情况。

Moreover, erythroid colonies could be grown from blood samples without the need for exogenous erythropoietin.

此外，在没有促红细胞生成素的血样中红细胞可以繁殖。

Objective: to understand the effects of exogenous androgen on the skeletal muscle fiber and its motor endplate.

目的：观察雄激素对骨骼肌肌纤维及其运动终板形态的影响。

A need for exogenous nucleotides may be expected when the body is growing rapidly or encounters immune challenge.

但机体在快速生长或受到免疫挑战时，需要外源添加核苷酸。

But in truth, sometimes exogenous estrogen makes pain worse, sometimes it doesn't, and sometimes it makes it better.

不过，事实是外源性雌激素有时候会加剧疼痛，有时则不会，有时候还会缓解疼痛。

Objective: to elucidate the role of bone marrow stromal cells in cooperation with exogenous cytokines in hematopoiesis.

目的：探讨胎儿骨髓基质细胞与外源性细胞因子的协同造血支持作用。

Apart from the difficulty of forecasting the impact of exogenous events, investors may have another reason for ignoring them.

除了难以预料外源性事件所带来的冲击力外，投资者们忽略这些事件可能还有其他原因。

Swine flu is just the latest in a series of "exogenous events" (risks originating outside the financial system) to test the markets.

“猪流感”不过是最近考验目前市场的众多“外源性事件”(来自金融体系之外的风险)之一罢了。

The pancreas may soon stop its own production of insulin and the body can become solely dependent upon the exogenous injections.

由于外来的激素含量巨大，自身胰腺可能停止分泌胰岛素，身体将完全依赖于这些外来的激素。

Through controlling enzymatic hydrolysis, earthworm can avail itself of the enzyme instead of exogenous enzymes, which can reduce the cost.

通过控制酶解条件，蚯蚓可以利用自身的酶源自溶来代替外源酶，从而降低成本。