We were suddenly faced with the necessity of training a lot of young men in the art of navigation.
我们突然面临训练许多年轻人航海技术的必要性。
-- Clyde Tombaugh 克莱德·汤博
We were suddenly faced with the necessity of training a lot of young men in the art of navigation.
我们突然面临训练许多年轻人航海技术的必要性。
-- Clyde Tombaugh 克莱德·汤博