Apply it with a damp natural sponge for the smoothest coverage over a large area.用潮湿的天然海绵涂抹，以达到在大片面积内最光滑的覆盖效果。He was the smoothest and probably the most powerful chief of staff in political memory.在人们关于政治人物的记忆里，他是最精明、可能也是最有权势的参谋长。It was one of the smoothest flights I've ever had.这是我经历过的最平稳的飞行之一。