要素条件（factor conditions）： 要素条件指一个国家在特定产业中有关生产方面的表现。其分類在不 同的文献中或有差異，但涵盖的范围大致類似，根据Porter的看...
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要素贸易条件 Factorial Terms of Trade ; DFTT ; Double factorial Terms of Trade ; Single Factorial Terms of Trade
维护条件要素 VKVG Maintain Condition Elements
单要素贸易条件 Single Factorial Terms Of Trade ; SFTT ; singleFactualTerms of trade
双要素贸易条件 Double Factor terms of Trade
和双要素贸易条件 Double FactorTerms of trade ; DFTT
为单要素贸易条件 Single Factor Terms of Trade ; SFTT
条件要素需求函数 conditional factor demand function
要素交易条件 condition of essential exchange
还有循环契约要素条件不变式等等，但前置、后置条件和类不变式是基本要素。
There are also loop invariants and a few others, but pre contract element condit- and post-conditions and class invariants are really the basic fabric of contracts.
由于大多数行星科学家认为水是生命的基本要素，因此黄钾铁矾的存在意味着火星上曾经存在出现生命的先决条件之一。
Since most planetary scientists believe that water is essential to life, the presence of jarosite means that one prerequisite for life was once present on Mars.
他们并指出，气温对社会生活的影响可能超过气候条件中的任何其他要素，特别是在长时期的温度巨变面前，人类社会显得尤其脆弱（1）。
They have also pointed out that temperature probably influences our lives more than any other climatic factor and human society is especially vulnerable to large, long-term temperature changes (1).
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