Geneticists in Canada have discovered a clue to the puzzle of why our cells get old and die...加拿大的遗传学家已经发现了解开细胞衰老、死亡之谜的线索。Geneticists only recently discovered the identity of the gene that causes it.基因学家最近才发现了造成这一现象的基因特征...

The program saved $11 million in 1988 by substituting generics for brand-name drugs.该计划用非专利药取代品牌药，在1988年节省了1,100万美元。Payers are being more pushy about getting patients to take generics.药物费用的支付者更倾向于让病人使用非专利药.This essay int...