导出多个命名成员
const namedMember1 = ...
const namedMember2 = ...
const namedMember3 = ...
export { namedMember1, namedMember2, namedMember3 }
const namedMember1 = ...
const namedMember2 = ...
const namedMember3 = ...
export { namedMember1, namedMember2, namedMember3 }