常见例句Ingratitude is a despicable vice.忘恩负义是可鄙的不道德行为。It is not only immoral but even a crime to build one's happiness on someone else's misfortunes.把自己的幸福建立在别人的痛苦之上不仅不道德甚至还是一种罪恶。 返回 vice crime