an insubstantial mirage on the horizon地平线上虚幻的海市蜃楼a mirage in the desert沙漠的海市蜃楼It hovered before his eyes like the mirage of an oasis.它在他眼前晃动，好像海市蜃楼里的绿洲。The girl was a mirage, cast up by his troubled mind.那个女孩是他的幻觉，是他那忧郁不...
His friends were shocked by his ingratitude to his parents.他对父母不孝,令他的朋友们大为吃惊.The person always returns ingratitude for kindness.这个家伙常常恩将仇报.Ingratitude is a despicable vice.忘恩负义是可鄙的不道德行为....