high-risk groups

• 高危人群

high-risk groups的用法和样例：

例句

1. Haing unusual moles, exposure to sunlight and being fair-skinned are thought to place people at higher risk.
   具有较大的痣，接受阳光暴晒和较浅肤色者被认为是皮肤癌的高危人群。
2. Chemoprophylaxis of close contacts and vaccination of high-risk population groups is ongoing.
   密切接触者的化学预防和高危人群组的预防接种正在进行。