灰心: lose heart; be discouraged; be disappointed; be disheartened 短语和例子再度陷入灰心沮丧之中 plunge back into the deepest discouragement; 不要灰心! don't be discouraged!; don't lose your heart
不屈: unyielding; unbending 短语和例子坚强不屈 iron-willed and unyielding; 英勇不屈 show unyielding heroism