Welcome On Board “上船”这个表达比“登船”更古老，然而，这两个表达可以互换使用，意思是进入船、飞机、火车或公共汽车： Jack was already aboard/on board when he remembered that he’d left his suit at home. The plane crashed, but everyone on board / aboard survived. 所有乘客都在船上吗？ 这是您的机长发言。欢迎登上这趟英国航空的航班。 Welcome on board/aboard can also be used figuratively when welcoming a new member of a team: Welcome on board/aboard, James always speaks very highly of you. Welcome, Janine. It’s good to have you on board / aboard!