吃紧
in short supply; dire; tense; critical; hard-pressed; important
好学近乎知,力行近乎仁,知耻近乎勇
to love learning is akin to knowledge, to study diligently is akin to benevolence, to know shame is akin to courage (Confucius)
绿翅金鸠
(bird species of China) common emerald dove (Chalcophaps indica)