fifty years of age

基本解释

Count all the men from thirty to fifty years of age who come to serve in the work in the Tent of Meeting.
从三十岁直到五十岁,凡前来任职在会幕里办事的,全都计算.
Researchers in the United States studied one hundred thousand women during an eight-year period, beginning in nineteen ninety-four. All of the women were fifty years of age or older.
从1994年开始，美国的研究人员在八年时间里研究了100,000名女性，她们的年龄都在50岁及50岁以上。
Almost at the same instant with the children, another couple approached the great basin. They consisted of a goodman, about fifty years of age, who was leading by the hand a little fellow of six.
几乎和这两个孩子同时，另外一对也走近了大水池；一个五十岁光景的老人牵着一个六岁的小娃娃，这大概是父子俩。

We are currently between thirty and fifty years of age, and there are 84 million of us in the United States.
FORBES: The Challenges Facing Gen X Women
In 1977, Brace published an article that put the age of the Western overbite at no more than two hundred and fifty years—which is to say that flatware and, with it, a significant change in how we chewed were all it took for the edge-to-edge occlusion that we inherited from the Neanderthals to be replaced by the bite we now call normal.
NEWYORKER: A Fork of One’s Own