This idiom means achieving two goals with one action.
Nánběicháo shíqī yǒu gè jiāngjūn jiào Zhǎngsūn Shèng
南北朝Nánběicháo🔊时期shíqī🔊，有个yǒu gè🔊将军jiāngjūn🔊叫jiào🔊长孙晟Zhǎngsūn Shèng🔊。
Tā wǔyì gāoqiáng yóuqí shàncháng shèjiàn
他tā🔊武艺wǔyì🔊高强gāoqiáng🔊，尤其yóuqí🔊擅长shàncháng🔊射箭shèjiàn🔊。
Yì tiān tā kàndào tiān shàng liǎng zhī dàdiāo zài zhēng shí
一天Yì tiān🔊，他tā🔊看到kàndào🔊天上tiān shàng🔊两只liǎng zhī🔊大雕dàdiāo🔊在zài🔊争食zhēng shí🔊。
Tā yí jiàn shè chū liǎng zhī dàdiāo tóngshí bèi shèluò
他tā🔊一箭yí jiàn🔊射出shè chū🔊，两只liǎng zhī🔊大雕dàdiāo🔊同时tóngshí🔊被bèi🔊射落shèluò🔊。
English Translation:
During the Northern and Southern Dynasties, there was a general named Zhangsun Sheng. He was highly skilled in martial arts, especially archery. One day, he saw two large eagles fighting for food in the sky. He shot one arrow, and both eagles were shot down at the same time.