09
≈: approximately equal to 约等于号
“3×3≈10” 读作:Three multiplied by three is approximately equal to ten.
10
1”读作:Two is greater than one.
12
≮: is not less than 不小于号
“3≮2”读作:Three is not less than two.
13
≯: is not greater than 不大于号
“2≯4” 读作:Two is not greater than four.
14
≤: is less than or equal to 小于或等于号
“2≤3”读作:Two is less than or equal to three.
15
≥: is greater than or equal to 大于或等于号
“5≥4”读作:Five is greater than or equal to four.
16
%: percent 百分之……
“10%”读作:ten percent
17
‰ : per mill ; per thousand 千分之……
“10‰”读作:ten per thousand
18
∞: infinity 无限大号
“-∞” 读作:negative infinity
19
∝: varies as 与...成比例
“X∝Y”读作:X varies as Y
20
√ ̄: square root 平方根
“√ ̄16=4”读作:The square root of sixteen is four.
21
3√ ̄: cube root 立方根
“3√ ̄27=3”读作:The cube root of 27 is 3.
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