国际:富有国家应承担气候变化的责任
'China has warned rich nations not to shirk their responsibility on climate change. It is urging them to provide developing countries with the funds they need to tackle the issue. The Ch...'
迅速诞生的甲流疫苗安全吗?
'甲型H1N1流感说到底还是流感,跟其它的流感疫苗在制备上也没有本质差别。目前的甲流疫苗是安全的。At a district clinic, doctors are giving vaccination injections some primary school students. Liang Xiao...'