no number

用法例句

oil viscosity rating

机油粘度号数（机油号数）

"If you really want to see him, it's room number four-"

“你当真要找他么？ 号数倒是四号——”

mathematical symbol

数学符号,运算符号

analog to digital(A/D)

模拟信号到数字信号

catalytic constant

催化常数[符号Kcat]

quantities (units and symbols)

数量（单位和符号）

The positive sign is +.

正数的符号是 +。

A symbol or word used to represent a number.

数字表示数的符号或字

Brackets: Pairs of marks used for enclosing words, figures, etc. These are Parentheses, Square brackets, Angle brackets and Brace.

括号:一对用来包括文字、数字等的符号。括号有小括号、中括号、角括号和大括号。

Note: The number enclosed in parentheses is the symbol number in ISOM2000.

注︰号名称后之数字乃该符号在ISOM2000的编号。

any of the natural numbers (positive or negative) or zero.

和带正号或负号的自然数。

Negative sign symbol:~~Tap a symbol to indicate negative numbers.

负号:~~点击用于表示负数的符号。

Comma separator, period decimal point: 1,234.567

逗号分隔符，句号十进制小数点: 1,234.567

Period separator, comma decimal point: 1.234,567

句号分隔符， 逗号十进制小数点: 1.234,567

The root of a quantity as indicated by the radical sign.

根，根号用根号表示出来的一个数的根

To number the leaves of(a manuscript, for example).

编号为（如一本手稿的）的页数编号

device for converting digital signals into analogue signals.

把数字信号转换成对等信号的装置。

device for converting analogue signals into digital signals.

把对等信号转换成数字信号的装置。