under certain circumstance

基本解释

On one hand, hES cells can maintain undifferentiated state under certain circumstance.
一方面，它能在体外特定的环境下保持不分化的状态并且无限扩增。
The night side of the Moon, also, under certain circumstance, shows some luminescence phenomena.
月面的夜区在某些情况下也会显出某种发光现象。
The teaching process of physical education course is a dynamic multi-sytem which performs under certain circumstance between teachers and students, learning and teaching, motivation and interest.
体育教学过程是一个多元的、互动的体系，这其中的师与生、教与学的意向、动机、兴趣等总是在一定的情境中产生的。

What I'm curious about is if this administration is open to the concept suggested by others of a federal buy-back program of, under some circumstance, purchasing back -- as some states have -- ammunition clips, certain types of weapons, other things like that as part of way to deal with two things that are happening.
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