半数的英文：
half the number
half

参考例句：
  • Half the garrison is/are on duty.
    有半数卫戍部队在执勤.
  • The boss sacked half of his employees at one sweep.
    老板一下子裁去了半数雇员。
  • The interview whipped up half the people into a frenzy of rage.
    这次会谈使半数人极为愤慨。
  • These can be benign or incapacitating and even fatal; almost any part of the body may be attacked.
    其中半数病程经过为良性，另外半数可致残或死亡。
  • He drinks half his earnings.
    他赚来的钱半数花在饮酒上。
  • T winning in an election because one has received the most votes (though not necessarily an absolute majority)
    以得票最多(但不一定超过半数)在选举中获胜.
  • A Republican chief justice, it seemed, had picked the president, and half America had been appalled.
    这看起来象是一个共和党的首席法官，挑出了总统，半数美国人感到惊骇。
  • In this particular tin-pot venture he'd sunk half the sum left him by his father.
    他把父亲留给他的钱半数投放在这种低级的冒险事业上。
  • Altogether, half the offspring will be homozygous at that particular locus
    加在一起，将有半数的后代在那个特定的位点上是纯合的。
  • Half-life is the time it takes one-half of the atoms of a radioactive material to disintegrate.
    半衰期是指放射性物质的原子有半数发生衰变时所需要的时间。
half是什么意思：
n. 一半；半场，半局
adj. 一半的，不完全的
adv. 一半地，部分地
  • That is a job and a half.
    那是非常困难的工作。
  • half-believe ";"half believing, half doubting
    将信将疑
  • His reply was taken half seriously half in jest.
    他的答覆看来是半开玩笑半认真的。
  • a half - and - half mixture of linseed oil and turpentine.
    亚麻籽油和松节油两种成分各占一半的混合物
number是什么意思：
n. 数；号码；算数
v. 给…编号；计算，数
  • The number was fifty.
    该数字为五十。
  • There is safety in numbers
    人多势众
  • It was an irrational number.
    这是一个无理数。
  • Which number on the card is a prime number?
    在卡片上哪一个数字是最初的数字？
  • The number raised to the logarithm of a designated number in order to produce that designated number.
    被升到指定数字的对数上的数量,是为了得到那被指定的数目。

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