second coat短语⁹⁰⁸⁸⁷⁺⁷ 基本例句 二次涂敷 Apply a second coat to both the fitting socket and the pipe. 在管件承插部位和管道上再涂敷第二层。 h6688 One coat is often enough, however, on very porous surfaces a second coat is necessary as soon as the first one has lost its glossy appearance. 一层往往是不够的，然而，在非常多孔表面，一旦第一层失去了它的光泽第二层是必要的。 gzxinri