picric acid

n [U] bitteryellow substance used in dyeing and in making explosives 苦味酸.

piccolo, pick, pick off, pick on sb, pick out, pick sb/sth out, pick sth over, pick up, pick-a-back, pick-a-back (also piggyback), pick-me-up, pick-up, picker, picket, pickings, pickle, pickpocket, pickup, picky, picnic, pictorial, pictorially, picture, picture postcard, picture-book, picture-card, picture-gallery, picturesque, picturesquely, picturesqueness, piddle, piddling, pidgin, pie, pie chart, pie dish, pie-eyed, piebald, piece, piece de resistance,