英文科技论文写作样式指南-空格
英文科技论文写作样式指南-空格
本文英文内容摘自
"Anne M. Coghill, Lorrin R. Garson. The ACS Style Guide: Effective Communication of Scientific Information, American Chemical Society: Washington, DC, 2006"
第二部分(Part 2. Style Guidelines)
第11章(11. Numbers, Mathematics, and Units of Measure)
第214–215页
Spacing
空格
Ø Leave a space before and after functions set in roman type, unless the argument is enclosed in parentheses, brackets, or braces.
Ø 除非参数包含在圆括号、方括号或大括号中,否则在以罗马字体的函数前后留空格。
log 2
–log x
4 sin θ
tan2 y
exp(–x)
cosh(βe0φ)
4 tan(2y)
erfc(y)
Ø Leave a space before and after mathematical operators that function as verbs or conjunctions; that is, they have numbers on both sides or a symbol for a variable on one side and a number on the other.
Ø 在充当动词或连词的数学运算符前后留空格;也就是说,它们的两边都有数字,或者一边是变量的符号,另一边是数字。
20 ± 2%
3.24 ± 0.01
4 × 5 cm
8 × 10–4
k ≥ 420 s–1
p < 0.01
Tg = 176 °C
n = 25
1 in. = 2.54 cm
例外1:
Leave no space around mathematical operators in subscripts and superscripts.
上标和下标中的数学运算符前后不留空格。
例1:ΔHn–1
例2:Eλ>353
例3:M(x+y)+
例外2:
Leave no space around a slash (a/b), a ratio colon (1:10), or a centered dot (PM·V).
斜杠(a/b)、比率冒号(1:10)或中心点(PM·V)前后不留空格。
Ø Leave no space between simple variables being multiplied: xy. Do not use a centered dot (·) or the times sign (×) with single-letter scalar variables.
Ø 要相乘的简单变量之间不留空格:xy。切勿在单字母标量变量中使用中心点(·)或乘号(×)。
Ø In multiplication involving the two-letter symbols for transport properties, use a space, enclose them in parentheses, or use the times sign. When superscripts or subscripts are present, the symbols can be closed up.
Ø 在涉及传输属性的双字母符号的乘法中,使用空格、将它们括在括号中或使用乘号。当存在上标或下标时,符号可以闭合。
例1:Re Nu
例2:(Re)(Nu)
例3:Re × Nu
例4:RexNuy
Ø Use a space for simple multiplication of functions of the type f(x) (one-dimensional) or g(y, z) (multidimensional). Close up multipliers to such functions where applicable. You may also use additional enclosing marks instead of spaces.
Ø 使用空格对f(x)(一维)或g(y, z)(多维)类型的函数进行简单乘法。在适用的情况下,闭合此类函数的乘数。亦可使用附加的封闭标记代替空格。
例1:W = 2f(x) g(y, z)(空格)
例2:W = 2[f(x)][g(y, z)](闭合标号——方括号)
Ø When mathematical symbols are used as adjectives, that is, with one number that is not part of a mathematical operation, do not leave a space between the symbol and the number.
Ø 当数学符号用作形容词时,也就是说,使用一个不属于数学运算的数字时,不要在符号和数字之间留空格。
–12 °C
25 g (±1%)
at 400× magnification
The level can vary from –15 to +25 m.
a conversion of >50%
a probability of <0.01
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