black despair meaning in Chinese

大失望
绝望

He was in black despair when he failed in the joint examination
（当他联考不及格时，他绝望了。）
They had set me with my back against the wall ; and i stood there , looking silver in the face , pluckily enough , i hope , to all outward appearance , but with black despair in my heart
他们把我按在墙壁上，背靠着站在那儿，我正盯着西尔弗的脸，表面上毫无惧色，但心里已经绝望了。