| 1. | Compound expressions are formed with the prefix operators and
复合表达式带有前缀运算符&和| 。 |
| 2. | If both sides of the comparison are columns or compound expressions , the setting does not affect the comparison
如果比较双方是列或复合表达式，则该设置不会影响比较。 |
| 3. | When writing compound expressions , you should be explicit and indicate with parentheses which operators should be evaluated first
在写复合表达式的时候，你应该就此指明和将最先要赋值的运算符通过括号来指定。 |
| 4. | You can write compound expressions by combining expressions as long as the types required by all of the operators involved in the compound expression are correct
你可以通过将表达式合成（的方式）写出复合表达式，只要复合表达式中包括的所有运算符所要求的数据类型是正确的就行。 |
| 5. | When writing compound expressions , you should be explicit and indicate with parentheses which operators should be evaluated first . this will make your code easier to read and to maintain
当写复合表达式的时候，你应该明确地和通过圆括号“ （ ） ”来指定顺序，圆括号内的运算符被首先求值。 |
