angular 数字逗号分隔_科技英语中阿拉伯数字与英语数词的使用方法

女爷i 2023-01-01 12:54 63阅读 0赞

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美国化学学会曾就数字用法提到如下规则：

*  基数词数字小于10 时用数词(即全拼英文单词)，10 以上的基数词数字用阿拉伯数字。这一点中英文是相似的。序数词由“第一”first) 到“第九”(ninth)全部拼写，序数词第10 以上前面部分用数字(即阿拉伯数字和序数词词尾) 。例如: three flasks , 30 flasks , the third flasks , the 12th flasks , seventrees , 10 trees , the eighth example, the 33rd example , the firstcentury , the 21st century，sixfold，20-fold
 *  在某一系列或范围内只要含有数字10 以上的项目就全部使用数字，非技术性文章也如此。例如: 5 , 8 , and 12 experiments , the 2nd and 20th samples , 5 - 15 repetitions 。
 *  在非技术意义上使用的很大数目，则使用数字与英文单词组合的方式。例如：

1 billion tons 180 millionpeople 2 million pounds

4.5 billion years $15million ( *not* 15 million dollars )

*  阿拉伯数字不能用于英文句子的开头。以某一特定数量开头的句子，数字和度量单位均需全部拼写。例如：

Twenty-five millilitersof acetone was added and the mixture was centrifuged.

如有可能也可改写这种句子，例如：

Acetone (25 mL) was added, and the was centrifuged.

A 25-mL portion of Acetonewas added the mixture was centrifuged.

尽管句子开头是全拼数量词，句子的其余部分只要合适仍可使用数字表示。例如：

Twenty-five millilitersof acetone and 5 mL of HCL were added.

Three micrograms ofsample was dissolved in 20 mL of acid.

Fifty samples werecollected , but only 22 were tested.

*  表达某种数学意义则使用数字。

The incidence ofdisease increased by a factor of 4.

The yield of productwas decreased by 2 orders of magnitude.

The efficiency of thereaction was increased 2-fold.

*  非数学意义上的后缀fold 和times 如伴有小于10的数字，则需将数字全部拼写出来。例如：

The purpose of thisdiscussion is twofold.

The beaker was rinsedfour times.

*  以数字表示比。例如

a ratio of 1 : 10    a ratio of 1/10

a 1 : 1 (volume ratio)mixture    a 1/1 (volume ratio) mixture

*  日期使用数字，不以序数词结尾。例如：

January 3，Jan 3; not January 3 rd，Jan 3rd

September 5，Sept 5；not September 5th, Sept 5th

*  使用数字的十进位，用加“s”构成其附属形式，不是在任一位置加所有格符号。例如：

the 1960s , *not* the 1960's , *not* the '60s

*  上午某一时刻用数字表示。例如：

12:15 a. m, 4:00 p. m.

*  分式的两项均小于10，则两项全拼写并以hyphen 分隔；如有一项大于10 则采用分式。例如：

one-quarter of theexperiments    two-thirds of results

1/20 of the subjects                       1/12 of the volume

*  用数字标记图、表、示意图、方程式和参考文献的序号
 *  论著中(不是在题名和章节名)无需反复重复化学名称，可使用黑体(不是斜体)数字(除阿拉伯数字有时也用罗马数字)编号标明各种化学物质。

The syntheses,structures. and stereodynamic behavior of the novel hexacoordinate siliconcomplexes 1 - 4 were described in this paper.

The cyclization of 1 ,3 , 5-hexntriene (6) to 1 , 3 cyclohexadiene (7) is predicted to proceed morerapidly in elect field.

Complexes 8 – 12 , In thepresence of monoamine oxidase. produce active catalysts for propylene polymerization.

Primary amines 2 - 5 , 7 , and 9 gave the game Cotton effect signs , depending on the configuration.

Monomer Ⅱ reacts with the initiator (Ⅱ, Ar = 2 , 6-diisopropylphenyl)  viaa ring-opening metathesis polymerization mechanism.

*  可用数字代表一组系列的组元名称。

Sample 1 contained a high level of contamination, but samples 2 and 3 were relatively pure.

Methods 1 and 2 were used for water-soluble compounds, and methods 3 and 4 were used for oil-soluble compounds.

*  以数字命名(并非计数) ，则加所有格符号" s "形成其复数形式，这里的" s "避免与数学意义上的表达相混淆，并明确" s " 不是名称的组成部分。

Boeing 747 's are amongthe largest airplanes.

*  用阿拉伯数字加双括号(不是单括号)列举文章中的各项短语或句子。例如：

Some advantages ofthese materials are (1) their electrical properties after pyrolysis, (2) theirability to be modified chemically before pyrolysis, and (3) their abundance and low cost.

*  可以阿拉伯数字加小圆点或用双括号列举所要表达的一组句子或分段编号。兹将这两种方式举例如下:

The results suggest thefollowing:

1. Ketones are moreacidic than esters.

2. Cyclic carboxylic acidsare more acidic than their acyclic analogues.

3. Alkylation of theactive methylene carbon reduces the acidity.

The results suggest the following:

(1) Ketones are moreacidic than esters.

(2) Cyclic carboxylicacids are more acidic than their acyclic analogues.

(3) Alkylation of theactive methylene carbon reduces the acidity.

下面是科技英语数字表达的一些具体格式：

*  对于带有度量单位的很大的数，可以使用10 的n 次方或选用适当的词头，

使得数字在四位数以内。例如