例句與造句

1. The graphitic schists may readily be believed to represent sediments once containing coal or plant remains; there are also schistose ironstones ( hematite-schists ), but metamorphic beds of salt or gypsum are exceedingly uncommon.
2. The bed rock on Budd Creek is composed of crystalline limestones, calcareous mica-schists, and graphitic schists, usually striking in a north-south direction, and having dips varying from 0?to 70?
3. This creek, like Budd Creek, flows west across the strike of the bed rock, which, as on Budd Creek, consists of limestones, calcareous and graphitic schists, with some intruded sills of greenstone, which are highly altered.
4. This creek is about long and flows nearly north, parallel to the strike of the bed rock, which consists of more or less flaggy beds of limestone, between which there is a strata of graphitic schist that outcrops along nearly the whole length of the creek.
5. It's difficult to find graphitic schist in a sentence. 用graphitic schist造句挺難的