Boolean constants and character constants also exist and are described in subsequent chapters along with their corresponding types.
类似的同样存在布尔型常量和字符常量，这些会在随后的章节与它们对应的类型一起介绍。
2
The Boolean parameters only need the flag character itself to set a value, but the other types of parameters require some sort of additional argument information.
boolean形参只需标记字符本身就可以设置一个值，而其他类型的形参还需要某种附加的实参信息。
3
Search strategies include single and multiple character wildcard searches, fuzzy and proximity searches, and AND, OR and NOT Boolean operations.
搜索策略包括单个和多个字符通配符搜索、模糊和近似搜索以及 AND、OR 和 NOT Boolean 操作。