例句與造句

1. The colour of illite jade is of distinct gradation which is related to the content of hematite in different sedimentary bed
   該玉石的顏色層次結(jié)構(gòu)清楚，分界明顯，與不同沉積層中赤鐵礦的質(zhì)量分?jǐn)?shù)有關(guān)。
2. It's difficult to find sedimentary bed in a sentence. 用sedimentary bed造句挺難的