... keep one's countenance镇定自若 give countenance to 赞成 keep someone in countenance 使某人克制灰心情绪...
2
?不动声色
...ards close to one's/the chest (参见「守口如瓶-- keep a quiet/still tongue) 不动声色；泰然自若 keep one's countenance; play it cool 创业不易，守业更难。 Keeping is harder than winning.
3
?泰然自若
...s); keep one's countenance; keep one's head; remain cool and collected; take ... coolly; with great composure 泰然自若的 collected; imperturbable; renita ..