The sales team is battle-hardened and knows its clients inside out.
Tips
history
From 《资治通鉴·后唐纪》: a minister pleads '群臣或从陛下岁久，身经百战，所得不过一州' — 'some of your ministers have followed you for years and fought a hundred battles, yet received only a single prefecture.' Originally literal military experience.
usage
Modern use has expanded far beyond the battlefield — seasoned sales reps, experienced programmers, hardened negotiators. Positive and admiring. Often with 的 as a modifier: 身经百战的老将 / 老兵 / 销售.
