【stay the course 坚持到底】
的本义是“流程，过程，路线”；stay the course的意思即是“持续到底”，喻指做亊不顾艰难，坚持到底。例如:I don’t think
he is sufficiently dedicated to staying the course.（我认为他不够坚定，不会坚持到底的。）
A:The teacher told my father that he was not to be a soldier when he was young, but he stayed the course, and finally became an officer.
B:He is really a tough man.
A:So when you told me that I couldn't be a reporter, I know I can.
B:Well, it would be a miracle.