Park says his group released 20 balloons carrying 15,000 pills of Tylenol, 20,000 masks and 30,000 Vitamin C pills into the North.

朴相鹤称，他的组织向朝鲜释放了20个气球，载有15000粒泰诺、20000个口罩和30000片维生素C。

Researchers randomly assigned 159 pregnant smokers to take either daily vitamin C pills or placebos.

研究人员们随机抽选了159名怀孕期间仍然吸烟的妇女，让她们每日服用维生素C或者安慰剂。