a difficult task; nesting places on the cliffs are difficult of access; difficult times; a difficult child; found himself in a difficult situation; why is it so hard for you to keep a secret?是什么意思_a difficult task; nesting places on the cliffs are difficult of access; difficult times; a difficult child; found himself in a difficult situation; why is it so hard for you to keep a secret?在线翻译_英语_读音_用法_例句