1.no less than大于等于
2.no more than小于等于
3.is equal to等于
4.round to/to the nearest四舍五入
5.A divided into B 即B/A，A divided by B 即A/B
6.be parallel to平行于
7.be perpendicular to垂直于
8、加+：Plus
9、減-：Minus
10、乘×：Times
11、除÷：Divided
基數詞-序數詞 表達分數：
1/2：one half, one second
1/12: one twelfth
3/8: three eighths
9/10: nine tenths
基數詞-基數詞 表達分數：
1/3: one over three
3/8: three over eight
小數英文表達：
1.5: one point five
