sediments

US

UK

B2 中高級
n. pl.名詞 (複數)沉澱物
The Policeman looked at the sediments in the bottle to see if it gave him any clues

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關於海洋,我們不知道的7件事 (7 Things We Don't Know About the Ocean)

10:32關於海洋,我們不知道的7件事 (7 Things We Don't Know About the Ocean)