随着潮水退去，沙滩上留下了许多贝壳。

As the tide ___recedes, many seashells are left on the beach.

随着药物开始发挥作用，他头疼的感觉慢慢减轻了。

As the medicine took effect, his headache ___receded gradually.

随着他年龄增长，发际线明显后移了。

His hairline has ___receded noticeably as he got older.