Hawaiian volcanoes are among the most thoroughly studied and systematically monitored active craters in the world.夏威夷火山是世界上研究得最透澈并且受到最严密监视的活火山之一.So, It is necessary to analyse its exegetical value systematically.因此, 系统地分...
With the gloom of the contraltos added , one could scarcely help shuddering.紧接着是忧郁的女低音, 谁都禁不住直打寒战.Female singers are classified as sopranos, mezzo - sopranos and contraltos.女歌手分为女高音 、 女低音和女中音....