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1·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。

2·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。

3·Disorders of old age are generally not exogenous.

老年疾病通长都不是起于外因的。

4·Exogenous nucleotides; Serum uric acid; Renal injury.

外源核苷酸；血清尿酸；肾脏损伤。

5·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。

6·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。

7·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。

8·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。

9·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。

10·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。

(1)exogenous variable外生变数，外生变量