请分别用这些词造个英文句子caucasian, harmonious,idyllic,incandescent ,oblong.

caucasian n.高加索人,高加索语系 adj.高加索人的It was the bloodiest so far in a series of bombings to have hit the Caucasian republics.这是在针对高加索*系列爆炸事件中最血腥的一次.harmonious adj.和...