"With the first subject, after about 20 hours of training, his digit span had risen from 7 to 20," Ericsson recalls.
“对于第一个实验对象，经过大约20小时的训练，他的数字跨度从7上升到20。”爱立信回忆道。
But he points out that most roofs, whether tile or asphalt-shingle, have a life span of 20 to 25 years.
但他指出，无论是屋瓦还是基于沥青材料的盖屋板，多数的屋顶的生命周期都约为20- 25年。
I wondered if 50 years had just simply flashed by or whether that boy and I had just simply changed places in the span of 20 seconds.
我有点迷惑，50年是否就已这么转瞬即逝，还是只不过我和那个男孩在20秒的时间里互换了位置。
Instead, he discovered that over every 20-year span he examined but one, stocks handily beat bonds.
相反，他发现在他的调查之中显示除了第一个之后每经过一个20年的跨度，股票轻而易举地击败证券。
I'll give you a life span of 20 years.
我给你20年的生命。
The letters, most of which are undated and not included in the collection that was published in 1994, span more than 20 years and cover a wide range of topics—artistic, literary and surreal.
这些信大多数没有签署时间，也没有出现在1994年出版的书信集里，书信内容涉及的范围很广——艺术、文学、超现实。
Philadelphia set a record of 20 consecutive defeats in 1973 in the same season and Cleveland lost 24 straight games in 1982 over a two season span.
费城队1973年创一个赛季连输20场指导录，而克利夫兰队则在1982年跨两个赛季连输24场。
Median life span in females was extended by about 20 percent and in males by about 12 percent.
雌性小鼠的平均寿命延长大约20%，而雄性小鼠大约为12%。
Over a span of 20 years, the researchers studied a group of 241 healthy elderly volunteers, giving them regular tests designed to measure their thinking or cognitive powers.
在长达20年时间里，研究人员们对241位老年志愿者进行研究，一定时间的对他们进行测试然后对他们的思维和认知力进行检测。
"I think the boba generation, if you will, can span everything from today's teenagers up through people probably my generation. I'm in my early 40s now. It covers a good 20 years or so," he explained.
我想波巴一代是指如今的青少年到大概我这个年纪的人，我现在刚40出头，这个名词的覆盖面近20岁。
Firebaugh and his colleagues measured the age, total family income, and general happiness of individuals aged 20 to 64, generally considered the working life span for most Americans.
格伦·菲尔鲍和他的同事们对20岁到64岁的不同人群的年龄、家庭收入和幸福感进行了调查。这个年龄段通常被认为是大多数美国人一生中参加工作的时间。
Regular weight asphalt shingles generally have an economic life span of 16-20 years;
普通重量的沥青瓦通常的使用年限为16-20年；
This kind of life, I'll give you a 20 year life span.
这样的生活我给你二十年的时光。
This kind of life, I'll give you a 20 year life span.
这样的生活我给你二十年的时光。
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