Eg. The traditional pattern of classroom experience at the college level brings the professor and a group of 20 to 30 students together for a 45-to-50-minute class session two or three times a week.
大学课堂的传统的教学方式是,一个教授和二三十名学生每周见面两三次,每次授课时间45到50分钟。
二. 人数用阿拉伯数字表示显得更简洁明了,但不定数量、近似值用单词表示较恰当。
Eg. There are 203817 voters on the electoral rolls.
选举名单上有203817个投票人。
Eg. Nearly thirty thousand voters took part in this election.
近3万个投票人参加了这次选举。
三. 遇到日期、百分比、带单位的特殊数字,通常用阿拉伯数字。
Eg. Maximum swivel of table is l20.
工作台的最大旋转角度是120度。
Eg. 3rd March l991或3 March l991;
a discount of 5 percent(5%的折扣);
Eg. purchased 7 yards of carpet(买7码地毯);
Eg. ordered 2 pounds of minced steak(订购2磅肉馅)
如果涉及的数目和单位是不定数,可用单词表示。
Eg. about five miles per hour(每小时大约5英里)
Eg. at least ten yards away(至少有10码远)
Eg. hesitated for a moment or two(犹豫了片刻)
Eg. I have warned you a hundred times(我已经警告你多少遍了。)
四. 在科技文章中,数字频繁出现,用阿拉伯数字比用单词陈述更有利。
Eg. The new engine has a capacity of 4.3 litres and a power output of 153 kilowatts at 4400 revolutions per minute.
这台新发动机的容积为4.3升,转速为每分钟4400转,时输出功率是153千瓦。
Eg. 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.