小猫缩着身子从刚开了一点儿的门中挤过来。The kitten wormed its way through the just-open door.默特尔缩着身子坐在床边哭泣。Myrtle sat huddled on the side of the bed, weeping.他们中一些人手持枪尖上挂着皱缩人头的长矛。Some of them carried pikes with shrivelled heads on top....
A large proportion of the fluorine is vaporized during the concentration process.在浓缩过程中大部份氟蒸出.health effects of fluorine pollution氟污染对健康的影响If the fluorine content is high, it may increase plant corrosion.如果氟的含量高, 会加剧设备的腐...