❶ 關於化學等式符號的讀法
通常將分子讀為基數，將分母讀為序數。
1/2 = a (or one) half
1/3 = a (or one) third
1/4 = a quarter or one fouth
1/5 = a (or one) fifth
2/3 = two thirds
9/10 = nine tenths
53/4 = five and three quarters
15/64= fifteen over (or by) sixty-four
15% = fifteen per cent
4‰ = four per mill
≤ is less than or equal to 小於或等於號
≥ is more than or equal to 大於或等於號
' apostrophe 省略號
；所有格符號
％ per cent 百分之…
- dash 破折號
‰ per mill 千分之…
' ' single quotation marks 單引號
∞ infinity 無限大號
double quotation marks 雙引號
∝ varies as 與…成比例
( ) parentheses 圓括弧
√ (square) root 平方根
[ ] square brackets 方括弧
∵ since; because 因為
《 》 French quotes 法文引號;書名號
∴ hence 所以
... ellipsis 省略號
∷ equals, as (proportion) 等於，成比例
¨ tandem colon 雙點號
∠ angle 角
ditto 雙點號
⌒ semicircle 半圓
‖ parallel 雙線號
⊙ circle 圓
／ virgule 斜線號
○ circumference 圓周
＆ ampersand = and
π pi 圓周率
～ swung dash 代字型大小
△ triangle 三角形
§ section; division 分節號
⊥ perpendicular to 垂直於
→ arrow 箭號；參見號
∪ union of 並，合集
＋ plus 加號；正號
∩ intersection of 交，通集
－ minus 減號；負號
∫ the integral of …的積分
± plus or minus 正負號
( ∑ sigma) summation of 總和
× is multiplied by 乘號
° degree 度
÷ is divided by 除號
′ minute 分
＝ is equal to 等於號
〃 second 秒
≠ is not equal to 不等於號
＃ number …號
≡ is equivalent to 全等於號
℃ Celsius system 攝氏度
≌ is equal to or approximately equal to 等於或約等於號
＠ at 單價
符號的英文讀法
period 句號
≈ is approximately equal to 約等於號
, comma 逗號
＜ is less than 小於號
： colon 冒號
＞ is more than 大於號
； semicolon 分號 B
≮ is not less than 不小於號
！ exclamation 驚嘆號
≯ is not more than 不大於號
？ question mark 問號
Mathematic Forms 數學式
(1) Addition 加法
1+2=3 One and two are three.
2+3=5 Two plus three equals five.
4+0=4 Four and nought is equal to four.
45+70+152=267 45,70 and 152 added are (or make) 267
the sum (or total) is 267.
(2)Subtraction 減法
9-4=5 Nine minus four equals (or is equal to) five.
15-7=8 Seven from fifteen leaves eight.
23,654-8,175=15,479 8,175 (take or subtracted) from 23,654 leaves 15,479. The difference
(or The remainder) is 15,479.
Nine from five won`t go