在日本，珍珠潜水曾经是许多沿海村庄的重要收入来源。

In Japan, ___pearl-diving was once a vital source of income for many coastal villages.

翻阅这些旧手稿就像潜水采珠，寻找被时间掩埋的智慧。

Going through these old manuscripts was like ___pearl-diving, searching for wisdom buried by time.