To test the role of the BMP4 protein, researchers raised a strain of mouse that lacks the protein. They subsequently found those mice had more 'wrong' connections, which they could not get rid of.

为了测试蛋白质BMP4的作用，研究人员饲养了一种缺乏BMP4蛋白质的老鼠，他们随后发现这些老鼠大脑中有很多错误的神经连接，而且他们的大脑无法自动纠正这些错误。

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To investigate GLP-1’s role in taste, the team used a strain of mice that were genetically engineered to lack GLP-1 receptors.

为了弄清GLP-1在味觉中的作用，该研究小组使用了一组通过基因改造而缺失GLP-1受体的老鼠。

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To investigate GLP-1's role in taste, the team used a strain of mice that were genetically engineered to lack GLP-1 receptors.

为了弄清glp - 1在味觉中的作用，该研究小组使用了一组通过基因改造而缺失glp - 1受体的老鼠。

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To investigate GLP-1's role in taste, the team used a strain of mice that were genetically engineered to lack GLP-1 receptors.

ECONOMIST: Hormones influence how sensitive taste buds are to sugar

Hart's public role as a man of distinction was a constant strain: inside it was all doubt.

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There is a strain of thinking in the administration, and among some experts, that Syria could return to its promising role as a partner in an agreement with Israel, as seemed possible in the 1990's.

CNN: Bush's goal: Balancing a host of opposing forces