These urge doctors first to check cholesterol levels, and then to divide patients into groups based on their heart risk. Doctors were given different LDL cholesterol targets for each.
这就要求医生首先要检查胆固醇水平，然后按照心脏病风险将患者划分为几组，然后分别给予不同的低密度脂蛋白胆固醇指标。
With the help of WAI-ARIA live regions, you can divide all contents dynamically changed or updated into several criteria levels and then decide how to inform and interact with the users.
借助WAI - ARIA活动区域，您可以将所有动态更改或更新的内容划分为若干标准级别，并决定如何通知用户并与用户交互。
You have to divide the column of air into a set of levels, get out your pencil or computer, and calculate what happens at each level.
你必须将气柱分解为很多不同的层，拿出你的纸和笔，计算在每一层的情况。
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