< is less than > is more than ≮ is not less than ≯ is not more than ≤ is less than or equal to 小于或等于号 - hyphen 连字符 ≥ is more than or equal to 大于或等于号 ' apostrophe 省略号,英文中省略字符用的撇号;所有格符号 % percent - dash 破折号 ‰ per mille ∞ infinity 无限大号 ∝ varies as 与…成比例 ( ) parentheses 圆括号 √ (square) root 平方根 [ ] square brackets 方括号 ∵ since; because 因为 《 》 French quotes 法文引号;书名号 ∴ hence 所以 … ellipsis 省略号 ∷ equals, as (proportion) 等于,成比例 ¨ tandem colon 双点号 ∠ angle 角 ∶ ditto 双点号 ⌒ semicircle 半圆 ‖ parallel 双线号 ⊙ circle 圆 / virgule 斜线号 ○ circumference 圆周 ~ swung dash 代字号 △ triangle 三角形 § section; division 分节号 ⊥ perpendicular to 垂直于 → arrow 箭号;参见号 ∪ union of 并,合集 ∩ intersection of 交,通集 ∫ the integral of …的积分 ± plus or minus 正负号 ∑ summation of 总和 × is multiplied by 乘号 ° degree 度 ÷ is divided by 除号 ′ minute 分 ″ second 秒 ≠ is not equal to 不等于号 ≡ is equivalent to 全等于号 ℃ Celsius degree 摄氏度 ≌ is equal to or approximately equal to 等于或约等于号
再附送希腊字母的读法
α Α alpha ['ælfa] β Β beta ['bi:ta / 'beita] γ Γ gamma ['gæma] δ Δ delta ['delta] ε Ε epsilon ['epsilan / ep'sailan] ζ Ζ zeta ['zi:ta] η Η eta ['i:ta / 'eita] θ Θ theta ['θita] ι Ι iota [ai'outa] κ Κ kappa ['kæpa] λ Λ lamda ['læmda] μ Μ mu [mju:] ν Ν nu [nju:] ξ Ξ xi [ksai / gzai / zai] ο Ο omicron [ou'maikran] π Π pi [pai] ρ Ρ rho [rou] σ Σ sigma ['sigma] τ Τ tau [tau] υ Υ upsilon ['ju:psilon / ju:p'sailan] o 是反 c 。 φ Φ phi [fai] χ Χ chi [kai] ψ Ψ psi [psi:] ω Ω omega ['oumiga / ou'mi:ga]