喻指排成长队的人群long queue(Britain); long line(US)

• 粮店门口购买春节供应的粮、油的市民排起了“人龙”。

  Residents of the city formed long lines at the entrance of the grain store in order to buy grain and oil for the Spring Festival.

• 排起“人龙”帮花农将一筐筐鲜花接运上船。

  Forming long lines helps flower growers to carry baskets of flowers on board.