Many kids normally start speaking relatively later, some at two years, some at two and half, some even at four years old.
有些孩子开始说话的时间比较晚，有的在两岁或者两岁半的时候开始说话，有的甚至要到四岁。
Quartz is quartz—a silicon ion surrounded by four oxygen ions—there's no difference at all between two-million-year-old Pleistocene quartz and Cambrian quartz created over 500 million years ago.
石英是石英——由四个氧离子围绕的硅离子——200万年前的更新世石英和5亿年前的寒武纪石英之间没有任何区别。
At that time, my little brother was about four years old and he missed mum all the time.
那时，我的小弟弟大约四岁，他一直想念妈妈。
Being barely three or four years old, the Civics in question are unlikely to have done more than 75,000 miles (120,000km) at the very most—about half their expected life.
仅仅才使用三到四年，备受争议的Civic轿车行驶里程最多不超过75000英里（120000千米）---为预计使用寿命的一半。
Take the case of a 16-year-old girl described four years ago in Nature by neurosurgeon Itzhak Fried of the University of California at Los Angeles.
洛杉矶加州大学神经外科医生伊查克·弗莱德在其发表在《自然》杂志的论文中，就介绍过这么一个例子：弗莱德当时正在研究一名16岁癫痫少女的大脑，以寻找刺激其癫痫发作的发作根源，结果却发现了一个奇怪的现象：只要他给病人的左前叶（说到底就是一个不足1平方英寸的区域）施加电流，那个女孩就会笑出声来。
I counted four computers in the back of the room, an ink-jet printer, and an overhead projector that looked to be at least 15 years old.
我在教室后面发现四台计算机，一台喷墨打印机，还有一个至少用了15年的投影仪。
She and Cassie, who was four years old at the time, moved to Laramie, Wyoming, to heal the old hurts and begin a new life.
邦妮和当时只有4岁的卡西搬迁到俄怀明州的拉勒米来医治多年的精神创伤,并开始新的生活。
Knowing that all four strains were at least 10,000 years old, scientists recalculated the virus's "molecular clock," measuring how fast it mutates.
知道了这四个种族已经有至少一万年历史，科学家重新计算了病毒的“分子钟”，测量病毒的变异速度。
Knowing that all four strains were at least 10, 000 years old, scientists recalculated the virus's "molecular clock," measuring how fast it mutates.
知道了这四个种族已经有至少一万年历史，科学家重新计算了病毒的“分子钟”，测量病毒的变异速度。
Mothers of Bryan's schoolmates, whom she had known since their kids were four years old, cut her dead at the supermarket.
即使Bryan同学的母亲们，从孩子4岁起就认识的她们也在超级市场里无视她的存在。
At one point last year four of the top ten albums in Britain were Beatles recordings and the number-one album was a collection of songs by Vera Lynn, who was then 92 years old.
去年某一时点上，英国10佳专辑中的4个都是披头士乐队的专辑，而排行第一的专辑则是薇拉•琳恩的歌曲专辑，当时这位歌手已经有92岁了。
I started my career as an entrepreneur at twenty-four years old, right out of college.
我24岁刚毕业时就开始了我的企业家生涯。
Twenty-four-years old, handsome and helpful, he is the overnight receptionist at the hostel and is working night shifts to fund himself through his archaeology degree.
他24岁的年纪，长得一表人才又乐于助人。 他是旅馆的夜班接待员，通过夜里打工来支持自己读考古学位。
One such patient is Eric Decker who had had bariatric surgery at Cincinnati Children's four years ago when he was 17 years old.
其中一个患者就是埃里克，四年前在他17岁的时候于辛辛那提儿童医院完成了治疗手术。
In comparison, Swissôtel is expanding at a slower pace, with only four properties in China so far, the oldest of which, the Swissôtel Beijing Hong Kong Macau Center, is seventeen years old.
与其他品牌相比，瑞士酒店在中国扩展的速度并不迅速，到如今只有四家，其中两家是新近开业的上海宏安瑞士大酒店和佛山恒安瑞士酒店，而北京港澳中心瑞士酒店已经成功运营了十七年了。
If she doesn't succeed this time, she'll likely to be too old to try again at the Games in four years.
如果这次不成功，四年后的下届奥运会，她的年纪就太大了。
After a long meditation, finally he attained the Four Noble Truths and Twelve Links of Causation at the night of December eighth of lunar calendar when he was thirty-five years old.
经过长时间的静坐思维，终于在腊月初八那夜，豁然大悟“四谛”、“十二因缘”之理，时年三十五岁。
For a typical family, four grow-ups are at the age of over 40 with a young kid less than 20 years old.
对与一个典型的家庭来说，四个成年人已过四十和一个不到20岁的孩子。
Father saw, the heart is very happy: do not look at this child is only four years old, but also really sensible miles.
爸爸看见了，心里很高兴：别看这孩子才四岁，还真懂事哩。
I was twenty-four years old at the time and had no close relatives. I was living in this same little apartment on Santa Fe Avenue, between Canning and Araoz.
当时我二十有四，身边没有亲人，住在位于坎宁和阿牢兹之间的圣塔菲大街的这套小公寓里。
I was twenty-four years old at the time and had no close relatives. I was living in this same little apartment on Santa Fe Avenue, between Canning and Araoz.
当时我二十有四，身边没有亲人，住在位于坎宁和阿牢兹之间的圣塔菲大街的这套小公寓里。
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