shè / jì / shī / tōng / guò / tiáo / zhěng / jī / yì / de / zhǎn / xián / bǐ / lái / tí / gāo / rán / yóu / xiào / lǜ设计师通过调整机翼的展弦比来提高燃油效率。The designer adjusted the wing's aspect ratio to improve fuel efficiency.