对于识别和研究带有低覆盖率的代码区域来说，它们是非常有用的工具，因为通过将它们在适当的浏览器或者编辑器中打开，从而强调了代码的选择区域。
These are useful tools for identifying and investigating areas of code with low coverage, because they highlight the selected area of code by opening it in the appropriate viewer or editor.
通过跟踪研究经过基因改造的蝾螈的单个细胞，对于它们失去的肢体再生这种貌似神奇的能力，研究人员找到了一个出乎意料的解释。
By tracking individual cells in genetically modified salamanders, researchers have found an unexpected explanation for their seemingly magical ability to regrow lost limbs.
雄鼠有时候会吃掉他的幼崽而不是养育它们，因此对于研究那些不存在杀婴行为的物种来说是，老鼠不是一个好的模型。
Male rats sometimes eat their young rather than nurture them, which makes them a poor model for studying how fatherhood affects the brains of species that frown on infanticide.
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