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- An elementary particle in the lepton family(not a meson), having a mass209times that of the electron, a negative electric charge, and a mean lifetime of2.2?0 - 6second. 介子轻子族中的一种基本微粒（非介子），其质量为电子的209倍，是一种负电荷，平均寿命为2。2?0－6秒
- An elementary particle in the lepton family(not a meson), having a mass209 times that of the electron, a negative electric charge, and a mean lifetime of2.2?0-6 second. 介子轻子族中的一种基本微粒（非介子），其质量为电子的209倍，是一种负电荷，平均寿命为2。2?0－6秒
- An elementary particle in the lepton family(not a meson), having a mass209 times that of the electron, a negative electric charge, and a mean lifetime of2.2?-6 second. 介子轻子族中的一种基本微粒（非介子），其质量为电子的209倍，是一种负电荷，平均寿命为2。2?－6秒
- And hence the mean lifetimes of the two brands of engines, are equal. 也就是说，两种牌号引擎的平均寿命是相等的。
- And hence the mean lifetimes of the two brands of engines are equal. 也就是说,两种牌号引擎的平均寿命是相等的。
- Interval Estimation of the Mean Lifetime of Electronic Products 电子产品平均寿命的区间估计法
- It's a once in a lifetime chance. 这是一生难得的机会。
- She devoted her lifetime to the study of zoology. 她以毕生精力从事动物学研究。
- He met with many a setback in his lifetime. 他一生中遭到过许多挫折。
- Do you mean say we are met for a thunder storm? 你肯定我们会遇到一场雷雨？
- I feel mean for not doing more for my son. 我对没为我儿子多做点事而感到惭愧。
- Defeat in this election would mean he was done for. 这场选举的失败意味着他政治生涯的结束。
- By power we mean the rate of doing work. 我们说功率就是指做功的速率。
- A lifetime guarantee; lifetime membership. 终身保障; 终身会员资格
- I have no conception of what you mean. 我想不出你的意思是什么。
- The mean yearly rainfall is20 inches. 每年平均降雨量是二十英寸。
- He is a legend in his lifetime for his scientific discoveries. 他的科学发现使他一生成为传奇人物。
- Do you mean Miss Anne Smith or Miss Mary Smith? 你指的是安·史密斯小姐还是玛丽·史密斯小姐？
- The eating habits of a lifetime are not easily given up. 一生中长期形成的饮食习惯是不容易改掉的。
- I have no idea (as to) what you mean. 我一点儿也不明白你的意思。
