pool

池, 水塘, 石油层, 联营

an excavation that is (usually) filled with water; an organization of people or resources that can be shared; any communal combination of funds; a small body of standing water (rainwater) or other liquid

合伙经营, 共享, 采掘, 汇聚成

汇合成塘, 淤积, 联营