topcoat

n 1 last of several coats of paint applied to a surface （几道涂料的）最外涂层. Cf 参看 undercoat 1. 2 (dated 旧) = overcoat.

toothpaste, toothpick, toothsome, toothy (-ier, -iest), tootle, top, top drawer, top gear, top hat (also topper), top secret, top ten, top twenty, top-boot, top-dress, top-dressing, top-flight, top-heavy, top-notch, top-ranking, top-up, topaz, topi, topiary, topic, topical, topicality, topically, topknot, topless, topmost, topographical, topographically, topography, topper, topping, topple, tops, topside, topsoil, topsy-turvy, tor,