应改写成：Sixty per cent profit
Eg. 1345 kilograms force was applied at the center point of the bar.
实验时在杆的中点加1345公斤力。
可改成When tested, a force of l345 kg was applied.
六. 遇到分数，可用带连字符号的单词表示。
Eg. At 1east two-thirds of the class have had colds.
这个班至少有三分之二的学生患重感冒。
Eg. Nitrogen forms about four-fifths of the atmosphere.
氮约占大气的五分之四。
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