灵活

flexible; agile; nimble; adaptable; dynamic; lively; supple; versatile; flexibility; agility; nimbleness; adaptability

运用

apply; utilize; employ; make use of; exercise; deploy; exploit; wield

关税

tariff; duty; customs duty; customs

保护

protect; secure; safeguard; conserve; preserve; shield; defend; guard; shelter; screen; protective; defensive; safeguarding; protection; defence; conservation; preservation; conservancy; wardship