Serpentine often contains some asbestos , and should be used with caution .因为蛇纹石往往包含了一些石棉，收集时应谨慎。They claim the council has prejudiced their health by failing to deal with asbestos.他们声称，理事会没有处理好石棉的问题，从而损害了他们的健康。The prosp...
她步态优雅地走上舞台。She stepped gracefully onto the stage.她优雅地走下台阶。She walked daintily down the steps.她优雅地坐到他脚旁的垫子上.She sank gracefully down onto a cushion at his feet....