gerontology
[,dʒerɒn'tɒlәdʒi]
n. 老医, 老

[医] 老医, 老病, 老

1. It's been extremely heartening to me in my gerontology career how rarely this argument has been used against me, even out of my hearing.
   老涯，激励，点其罕见被，即使背。
2. But in gerontology it matters a lot, because the number of people( or animals) that we can look at the ages at death of is relatively small.
   但，老，，察死龄（动）目。
3. Bolden was born Aug.15,1890, according to the Gerontology Research Group, a Los Angeles organization that tracks the ages of the world's oldest people.
   据洛杉矶"老研究组织"绍，波尔顿18908月15日。组织专门责"追踪"界寿命老龄。

gerontology
[ noun ]
the branch of medical science that deals with diseases and problems specific to old people
<noun.cognition>