【机】 生产气体炭黑的过程

black tea

black brick

black-and-white

Eriochrome blue black R

Ribes americanum Mill.;American black currant;wild black currant

Medicago lupulina L.; yellow trefoil; black medick; hop clover

Gaylussacia baccata K.Koch;black huckle-berry

Thunbergia alata Bojer;black-eyed susan;black-eyed clockvine