Many genes have been found that, when mutated, show no visible phenotypic effects under laboratory conditions.

我们发现很多基因突变以后在实验室条件下没有可见的表型。

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Under laboratory conditions, mineralization began within four to six weeks and had occurred extensively within months.

在实验室条件下，矿化在四至六周内开始，并在六个月内产生全面的化学反应。

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The findings discussed in this article are based on a solution that was created and tested under laboratory conditions.

本文论述的结果基于一个在实验室环境下创建并测试的解决方案。

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Once the cremations have been removed from the urns, the bones will be cleaned and dried under laboratory conditions.

BBC: Secrets of St Albans' Roman burial urns unlocked

"What was seen under laboratory conditions has probably already taken place in any number of commercial fishing grounds, " warned the researchers.

BBC: Fish on a trawler boat

Samples of 400-year-old plants known as bryophytes have flourished under laboratory conditions.

BBC: Centuries-old frozen plants revived