1704946664
She likes to be the centre of attention all the time．她喜欢一直是大家注意的中心。
1704946665
1704946666
Broadway is the theatrical centre of the United States．百老汇是美国的戏剧中心。
1704946667
1704946668
cultural centre 文化中心
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1704946670
financial centre 金融中心
1704946671
1704946672
in the midst of也表示“在……中间（当中）”：
1704946673
1704946674
They wanted the picnic to be in the midst of the forest．他们希望野餐在森林中举行。
1704946675
1704946676
I saw him in the midst of the crowd．我看见他在那一群人中间。
1704946677
1704946678
She took ill in the midst of the ceremony．在举行仪式的过程中她生病了。
1704946679
1704946681
607 million—billion—trillion
1704946682
1704946683
million指百万（后面一般不加-s）：
1704946684
1704946685
The population of Scotland was nearly two million．苏格兰的人口近200万。
1704946686
1704946687
She made two million dollars in one year．她一年赚了200万美元。
1704946688
1704946689
在个别情况下可加-s：
1704946690
1704946691
Millions of lives have been saved．数以百万计的生命得救了。
1704946692
1704946693
His idea is worth millions．他的主意值多少百万。
1704946694
1704946695
billion现在都指“十亿”（通常不加-s）：
1704946696
1704946697
A human adult has about 100 billion cells．成人身体约有1000亿个细胞。
1704946698
1704946699
3 billion dollars 30亿美元
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1704946701
over 1.3 billion people 13亿多人
1704946702
1704946703
在个别情况下可加-s：
1704946704
1704946705
Their light has taken billions of years to reach us．它们的光线经过许多亿年才到达我们这里。
1704946706
1704946707
Biological system has been doing this for billions of years．生物系统这样做已经有多少亿年了。
1704946708
1704946709
He thought that it must be worth billions．他认为这准值几十亿。
1704946710
1704946711
过去在英国它曾表示1000000000000，但现在已经过时。
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1704946713
trillion表示1000000000000（1万亿）：
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