Probably a widower enjoys a second wife as much as a widow enjoys her husband 's lif .
很可能,鳏夫之欣赏其第二任妻子,差不多等于寡妇之欣赏其前夫的。
Professor niehans discovered last century the beneficial effects of cellular therapy : he transplanted parathyroid glands from a veal to a young man and saved his lif .
Patterson and colleague sylvian bauer injected a natural protein from the body -- leukemia inhibitory factor , or lif -- into a part of the brain of adult mice where stem cells reside .