A different stain marks nerve cell fibers (bottom), revealing heavy staining in the central region where nerve fiber tracts connect one region of the brain to another.
Heavy rains had softened the bottom of the valley.
大雨已经泡软了谷底的土壤。
3
I would bet my bottom dollar that if this stern-looking man is a manager of a company, the company will hardly suffer a heavy loss, for he is a crafty boss.