iBT新托福重点考察词汇：sediment

1)sediment　　/ ˈsedɪmənt; ˋsɛdəmənt/ n [U]

matter that settles to the bottom of a liquid 沉淀物: a wine with a gritty sediment 有沙粒状沉淀物的葡萄酒.

matter (eg sand, gravel, mud, etc) carried by water or wind and deposited on the surface of the land 沉积物(如沙﹑ 砾石﹑ 泥等).

2)sedimentary / ˏsedɪˈmentrɪ; ˏsɛdəˋmɛntərɪ/ adj

of or like sediment; formed from sediment (似)沉淀物的; 由沉淀物形成的: sedimentary rocks, eg sandstone, limestone, slate 沉积岩(如砂岩﹑ 石灰岩﹑ 板岩).

3)sedimentation / ˏsedɪmenˈteɪʃn; ˏsɛdəmɛnˋteʃən/ n [U]

(geology 地质) process of depositing sediment 沉淀; 沉积.

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