CONVENTION
（尤用作对即将进行长途艰险旅行的人的祝愿语）幸运，成功,(一路)平安
The term Godspeed is sometimes used in order to wish someone success and safety, especially if they are about to go on a long and dangerous journey.
例句
I know you will join me in wishing them Godspeed.
我知道你会同我一起祝愿他们诸事顺遂的。