+ plus 加号;正号- minus 减号;负号± plus or minus 正负号× is multiplied by 乘号÷ is divided by 除号= is equal to 等于号≠ is not equal to 不等于号≡ is equivalent to
有天，一位程序员大大在刷百词斩背到nouveau这个单词时，甩出一个问题:单词所配例句:Only the nouveau riche， or the new rich， spend money like you do. 只有暴发户才像你这样花钱。
如果学了多年英语，对于标点符号还是似懂非懂的话，现在真是及时雨。1. 书写常用符号．period / full stop / dot 句号，点，comma 逗号：colon 冒号；semicolon 分号！
在指导留学文书的过程中，AADPS的陈欣老师常常发现学生们对于英文标点掌握得较弱。受到母语影响，不少学员都会下意识的把之前的写作习惯带入进来。虽然现代汉语的标点系统本身也是受到西方语言影响的，但中英文的标点规则还是有不少区别。
错误:For long sentences， the better alternative is to make them two separate sentences， with either a period or a semi-colon separating them， rather than using lots of commas， which I find annoying， and others will also， so avoid doing this.
