be calm and collected;imperturbable; be in possession of oneself; remain calm;self-composed; with self-possession; with(great) presence of mind
? 他面對兇殘的敵人～。He remained calm in face of the ferocious enemy
鎮(zhèn)定自若zhèn dìnɡ zì ruò
形容遇事從容不迫，處變不驚。be perfectly calm and collected, self-composed, imperturbable, with self-possession, be in possession of oneself