四. 在科技文章中，數(shù)字頻繁出現(xiàn)，用阿拉伯數(shù)字比用單詞陳述更有利。

　　The new engine has a capacity of 4.3 litres and a power output of 153 kilowatts at 4400 revolutions per minute.

　　這臺新發(fā)動機的容積為4.3升，轉(zhuǎn)速為每分鐘4400轉(zhuǎn)，時輸出功率是153千瓦。

　　We know that the weight of a cubic foot of air at 0?C and 76cm，pressure is 0.08l pound, or 12 cubic feet of air weigh a pound.

　　我們知道，1立方英尺的空氣在0攝氏度和760毫米汞柱壓力下，重量是0.81磅，也就是說12立方英尺空氣的重量是1磅。

　　五. 句首不用阿拉伯數(shù)字，句末要盡量避免用阿拉伯數(shù)字。

　　1. 4th July is an important date in American history.

　　7月4日是美國歷史很重要的日子。

　　應該寫成The fourth of July...

　　2. 19 couples took part in the ballroom dancing competition.

　　19對選手參加了交際舞比賽。

　　應改寫成：Nineteen couples took...

　　3. 60% profit was a reported.

　　據(jù)報道有60%的利潤。

　　應改寫成：Sixty per cent profit…

　　4. 1345 kilograms force was applied at the center point of the bar.

　　試驗時，在桿的中點加了1345公斤力。

　　可改成When tested, a force of l345 kg was applied...

　　六. 遇到分數(shù)，可用帶連字符的單詞表示。

　　At 1east two-thirds of the class have had colds.

　　這個班至少有三分之二的學生患重感冒。

　　Nitrogen forms about four-fifths of the atmosphere.

　　氮約占大氣的五分之四。