空白字符 whitespace character ; [计] blank character ; space character ; whitespace

当变量为空白字符时 Isspace

缩进与空白字符 Indenting and Whitespace

是否是空白字符 ctype_space check for whitespace character

引导空白字符 leader blank

判断是否是空白字符 int isspace

泛空白字符 white space

字符空白 [计] character blank

空白字段说明符 blank field descriptor

空白控制字符 [计] blank control character