职称英语教材(13)
发布时间:2021-06-08
发布时间:2021-06-08
中级 理工类
其他的基数词可以以下面的方式构成:
(1)22——99 先说“几十”,再说“几”,中间加连字号: 23 twenty-three 89 eighty-nine
(2)101——999 先说“几百”,再加and,再加末两位数(或末位数): 216 two hundred and sixteen 423 Four hundred and twenty-three 809 eight hundred and nine
(3)1,000以上的数,先从后向前数,每三位数加一个“,”,第一个“,”号前为thousand,第二个“,”号前为million,第三个“,”号前为billion,然后一节一节表示:
1,001 one thousand and one 4,000 four thousand
9,743 nine thousand,seven hundred and forty-three
174,301 a (one) hundred and seventy-four thousand , three hundred and one 750,000,000 seven hundred and fifty million 4,000,000,000 four billion
2.序数词用于表示顺序。序数词一般以与之相应的基数词加词尾th构成,如seventh(第七),tenth(第十)。但下面这些基数词在变为序数词时,有特别的地方:
(1)one—first; two—second;three—third;five—fifth; eight—eighth; nine—ninth; twelve—twelfth.
(2)以-ty结尾的词,要先变y为i ,再加-eth,例如: twenty—twentieth; forty—fortieth
(3)以one , two , three , five , eight , nine收尾的多位数词,要照第一条办法变,例如:
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中级 理工类
twenty-one—twenty-first; twenty-two—twenty-second thirty-five—thirty-fifth;ninety-nine—ninety-ninth 另外,要注意下面几项的读法:
(1)年份:1949['nainti:n 'f : ti: 'nain] 1804['eiti:n ou 'f :]或['eiti:n 'f :]
685 B.C.(公元前)['siks 'eiti 'five 'bi: 'si:] 1970’s或1970s['nain'ti:n 'sev ntiz]七十年代
(2)日期:May 23 (rd)读为May twenty-third或the twenty-third of May (3)时刻:8:00 eight o’clock或eight 9:15 nine fifteen或a quarter past nine 2:30 two thirty或half past two 5:45 five forty-five或a quarter to six
3.分数词 是以基数词和序数词的。基数词代表分子,序数词代表分母,除了分子是“1”外,序数词都要用复数,
如:
125
one-fourth; two-thirds; five-twelfths; 431237
2two and three-fifths; 30thirty and seven-eighths 58
另外还有下面一些表示法:
113a (one) half; a (one) quarter;three-quarters 24411
2two and a quarter; 1one and a half 42
比较复杂的分数词读法如下:
2233twenty-two over nine; thirby-three over eighty-nine 989
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