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1·Regularly flowing rivers and streams that originate within arid lands are known as endogenous.

起源于干旱地区的流动性河流和溪流通常被称为“内源河流”。

2·Endogenous rivers often do not reach the sea but drain into inland basins, where the water evaporates or is lost in the ground.

内源河流通常不会流入大海，而是流入内陆盆地；在那里，水会蒸发或流失到地下。

3·The clock oscillates at its own endogenous, or internal, period.

生物钟以自己的内在周期运作。

4·Endogenous angiogenesis inhibitors act as tumor suppressor proteins.

内源性血管生成抑制剂可作为一种抑癌蛋白。

5·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。

6·But the effects of endogenous structure can wreak havoc with this theory.

不过，内生性结构的影响会严重打击这一理论。

7·Facts have proved that China-Russia economic cooperation enjoys strong endogenous dynamics.

事实证明，中俄经济合作的内生动力十分强劲。

8·The “endogenous” factors (those originating within the system) seem so much more important.

相比之下，“内源性”因素（来自本系统内部）似乎重要得多。

9·Another referred to as endogenous depression, we must take medicine, but medicine is effective.

另一种称为内源性抑郁，必须吃药，而且吃药是有效果的。

10·The human genome, for example, is thought to owe some 8 percent of its code to endogenous retroviruses.

举个例子来说，人类基因代码有大约8%属于内源性的逆转录病毒。

(1)endogenous variable内衍变量，内生变数