The main throat means to describe a passage with an important position or dangerous situation, and it is used as an important transportation passage in the military. Its synonyms mainly include: throat artery, strategic artery, dangerous pass and pass.
Sentence: 1937 In the first half of the year, Beiping was controlled by Japanese puppet troops on the east, north and west sides, and Lugou Bridge in the southwest suburb of Beiping became the main throat of Beiping leading to Tianjin in the south.