Daily Chinese Idiom Guessing Game
An achievement or quality is especially commendable because it is rare and difficult to attain.
难能极难做到。指不容易做到的事居然能做到，非常可贵。
宋·苏轼《荀卿论》子路之勇，子贡之辩，冉有之智，此三子者，皆天下之所谓难能而可贵者也。”
Her ability to stay calm under pressure is truly admirable and hard to come by.