蚕食

例句：

1. 1. The land was slowly being engulfed by the sea.
   这片土地正被海水逐渐吞没。
2. 2. The disease gradually consumed her health.
   这种疾病逐渐消耗了她的健康。
3. 3. The company's profits were steadily eroding due to competition from new competitors.
   由于来自新竞争对手的竞争，公司的盈利正在稳步减少。