1.Scientists from the World Health Organization (WHO) say the world is possibly at risk from a deadly disease.
at risk 处于危险之中
What steps should be followed if they believe that one of their teenage patients is at risk for suicide?
如果他们确信他们的少年患者中有人有自杀风险,那么他们应该采取什么样的步骤?
2.It could come from existing diseases changing and becoming strong enough to resist our vaccines.
resist 抵抗
At that time the government was unwilling to resist the foreign invasion.
那时政府对外国的入侵不愿进行抵抗 。