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。

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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。

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To combat the symptoms caused by this drop in estrogen, many women begin taking exogenous estrogen-that is, estrogen not made naturally in the body but taken as a drug.

为了抵抗由雌激素下降引发的症状，许多女性开始服用外源性雌激素，即并非由身体自然产生、作为药物服用的雌激素。

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Most financial talk treats systemic risk as a matter of exogenous events, sort of like comets that originate outside the normal operations of the solar system, unpredictably appearing, flashing across the sky and then suddenly disappearing.

FORBES: Magazine Article

The problem is that for many large firms, systemic risk is a matter of exogenous events, sort of like comets which originate outside the normal operations of the solar system, suddenly appearing, flashing across the sky and then disappearing.

FORBES: 'Systemic Risk' Is Not Event Driven, It Is Character Driven

The modus operandi of this process - success, failures or conflicts - were examined with a view to highlighting exogenous and endogenous limitations.

UNESCO: MEDIA SERVICES