"淀"是个多义词，它可以指淀（汉语）,夜土。
n. precipitate
vi. settle
misc. form sediment ; shallow lake
此外，该区将改善白洋淀的水质，白洋淀是中国北方最大的淡水湿地之一。
What's more, the area will improve the water quality of Baiyangdian Lake, one of the largest freshwater wetlands in North China.
在陶瓷基片上淀积了薄薄一层半导体。
A thin layer of semiconductor is deposited on a ceramic base.
该淀积层的面积和高度决定了球的最终尺寸。
The area and height of this deposition determine the ultimate ball size.
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