placed or as if placed in parentheses
n an expression in parentheses s qualifying or explaining
-s form of parenthetical n an expression in parentheses s qualifying or explaining
balanced parentheses
[计] 平衡圆括号
nested parentheses
[计] 嵌套圆括号
parentheses nesting
[计] 括号层数, 括号嵌套
parentheses use
[计] 括号使用
