n. 乘客, 旅客
The now extinct passenger pigeon has the dubious honor of being the last species anyone ever expected to disappear.
六级 · CET-6 2022年9月 第1套
At one point, there were more passenger pigeons than any other species of bird.
六级 · CET-6 2022年9月 第1套
Despite their huge population, passenger pigeons were to human intrusion into their nesting territory.
六级 · CET-6 2022年9月 第1套
By the 1850s, commercial trapping of passenger pigeons was proceeding at an pace.
六级 · CET-6 2022年9月 第1套
As numerous as the passenger pigeons were, they were not an resource.
六级 · CET-6 2022年9月 第1套