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.是什么意思_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.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句