the mainstay of stha. an important part of something that makes it possible for it to work properly or continue to exist…的主要依靠（支柱）:•Agriculture is still the mainstay of the country's economy.农业仍然是这个国家经济的主要支柱。b. someone who does most of the important work for a group or organization…的挑大梁的人物（台柱子，骨干）:•She was the mainstay of the team.她是这个队的骨干。 |