an unpleasant feeling caused by the realization that something unpleasant or undesirable has happened or is about to happen
（因意识到已发生或将要发生不愉快、讨厌的事情而引起的）颓丧感
fail or succeed entirely by one's own efforts
完全靠个人努力决定成功与否
To succeed or fail without alternative.
或成或败，毫无选择