half life
n.[核](放射性)半衰期
难易程度:
half life为短语/超纲词汇
half life
半衰期是指某种特定物质的浓度经过某种反应降低到剩下初始时一半所消耗的时间，半衰期是研究反应动力学的一个容易测定的重要参数，数学上可以证明，只有一级反应的半衰期是恒定的数值，且知悉一个一级反应的半衰期便可以计算出该反应的所有动力学参数，所以人们通常只关心一级反应的半衰期。常见的一级反应有：放射性核素的衰变、一级化学反应、药物在体内的吸收和代谢等。
1. Even he still lives under the illusion that country life is somehow superior to town life.
即使他也仍存有幻觉，好像乡村生活就是比城市生活优越。
2. Eliot recommends taking charge of your life.
埃利奥特建议人们控制自己的生活。
3. But, if this world is not merely a bad joke, life a vulgar flare amid the cool radiance of the stars,
如果这个世界不只是一个拙劣的恶作剧，如果人生不只是群星寒光中平凡的一闪，
4. But she had had a hard life and it had knocked the youth and good looks out of her.
但是她曾经过着很艰辛的生活，这种生活使她失去了青春和美貌。
5. Back in the good old days of stable economic expansion — the 1950s and 1960s — a person could choose to do something new, exciting, and creative in life but could also choose to say, "That's not for me:
回顾过去经济平稳发展的好时光--20世纪的50年代和60年代--人们可能会选择生活中某种既新鲜刺激，又有创意的事干，但是也可能会说：
6. By comparison, nearly half of male high-school students express their preference for a traditional, male-headed, one provider, nuclear family, where the wife stays home as mother and housewife.
与此相比, 几乎有一半男中学生表达了他们对传统的、以男人为家长的、只有一个人养家糊口的核心家庭的偏爱，在这种家庭里妻子作为母亲和家庭主妇呆在家里。
7. But he brought his American baby girl with him, and a life-style flavoured with American ways.
但是他把在美国出生、尚在襁褓中的女儿及带有美国情调的生活方式也一起带了回来。
8. But for over half of his screen career, Chaplin had no screen voice to confirm his British nationality.
而在卓别林大半的银幕生涯中，银幕上的他是不出声的，也就无法证明他是英国人。
9. But a single optical fiber with a diameter of less than half a millimeter can carry more information than a large cable made of copper wires.
但是单单一根直径小于半毫米的光纤电缆就可以比由铜丝制成的粗电缆负载更多的信息。
10. Bad as well as good moods add flavor to life and build character. The key is balance.
坏情绪和好情绪都给我们的生活增添了风味，也构成了我们的性格，关键是要平衡。
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即使他也仍存有幻觉，好像乡村生活就是比城市生活优越。
2. Eliot recommends taking charge of your life.
埃利奥特建议人们控制自己的生活。
3. But, if this world is not merely a bad joke, life a vulgar flare amid the cool radiance of the stars,
如果这个世界不只是一个拙劣的恶作剧，如果人生不只是群星寒光中平凡的一闪，
4. But she had had a hard life and it had knocked the youth and good looks out of her.
但是她曾经过着很艰辛的生活，这种生活使她失去了青春和美貌。
5. Back in the good old days of stable economic expansion — the 1950s and 1960s — a person could choose to do something new, exciting, and creative in life but could also choose to say, "That's not for me:
回顾过去经济平稳发展的好时光--20世纪的50年代和60年代--人们可能会选择生活中某种既新鲜刺激，又有创意的事干，但是也可能会说：
6. By comparison, nearly half of male high-school students express their preference for a traditional, male-headed, one provider, nuclear family, where the wife stays home as mother and housewife.
与此相比, 几乎有一半男中学生表达了他们对传统的、以男人为家长的、只有一个人养家糊口的核心家庭的偏爱，在这种家庭里妻子作为母亲和家庭主妇呆在家里。
7. But he brought his American baby girl with him, and a life-style flavoured with American ways.
但是他把在美国出生、尚在襁褓中的女儿及带有美国情调的生活方式也一起带了回来。
8. But for over half of his screen career, Chaplin had no screen voice to confirm his British nationality.
而在卓别林大半的银幕生涯中，银幕上的他是不出声的，也就无法证明他是英国人。
9. But a single optical fiber with a diameter of less than half a millimeter can carry more information than a large cable made of copper wires.
但是单单一根直径小于半毫米的光纤电缆就可以比由铜丝制成的粗电缆负载更多的信息。
10. Bad as well as good moods add flavor to life and build character. The key is balance.
坏情绪和好情绪都给我们的生活增添了风味，也构成了我们的性格，关键是要平衡。
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