The silkworms have gone into the bushes to spin their cocoons.蚕上山了.Silkworms make cocoons.蚕做茧。Many species of earthworms produce cocoons through the year.许多种蚯蚓全年产茧....
来自智利Lascar和 Villarrica火山对对流层烟羽状的特征和发展.Characterization and evolution of tropospheric plumes from Lascar and Villarrica volcanoes, Chile.如果羽状的烟雾窜出并且上升, 将足以使船沉没.If a plume blows out and rises, it can sink the ship.羽状的火焰从楼顶...