1.refer to 指的是

例句：He never referred to his sisters in his letters.
他在信里从未提到过他的姊妹_)4!9q2qz9y&。

2.focuse on 集中于

例句：Our meeting focuses on the question of women's right.
我们会议的重点是妇女权利问题K=zhhCVg2oK2K^5!O_G&。

3.health care 卫生保健

例句：Nobody wants to pay more for health care.
没人愿意为医疗保健花更多的钱8]x8#F4WS]v。

4.warn of 警告

例句：The government warned of the storm.
政府预告说有暴雨etWhZCysCyc,CyV]C。