priming coat
n. 打底层, 底层漆, 底面涂层
例句与用法：
Mr. Heath is the former Prime Minister of Britain.
希思先生是英国前任首相。
British politician who served as prime minister(1770-1782) under George III and instituted policies that led to the rebellion of the American colonies.
诺思爵士，托马斯1535？－1601？英国翻译家，他的关于蒲鲁特克著作的版本被用作许多莎士比亚戏剧的来源