the area of greatest activity, where you can have an important effect on sth 前线；最重要的岗位◆The company is in the front line of the global telecoms industry. 这家公司处於全球电讯产业的前线。
the group of employees in a company who deal directly with customers or who physically produce sth; the work that they do （公司里的）一线员工；一线工作◆Managers weren't giving feedback to the people on the front line. 管理者没有给一线人员反馈。