When scientists connect a gene to a disease, they often don't know what that gene does-the protein it makes or the process it regulates-or what factors turn it on or off, up or down.
当科学家们将基因与特定疾病联系在一起的时候，往往不知道这些基因起什么作用——这些基因能产生何种蛋白质或控制哪个过程——还有什么因素会促使它们开或闭，激活或睡眠。
If you look up, you lose most of your momentum, and this slows you down on every part of the turn, including the push-off.
如果你看的话，你会损失大部分冲力，并且这会让你在转身的每个动作都减慢，包括蹬壁。
If you look up, you lose most of your momentum, and this slows you down on every part of the turn, including the push-off.
如果你看的话，你会损失大部分冲力，并且这会让你在转身的每个动作都减慢，包括蹬壁。
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