The sand massed to form a dune.沙积集起来成了沙丘.The Assumption of the Sand - dune.沙丘的傲慢自负.Using ecological mat to control mobile sand dune can achieve outstanding effect.应用生态垫结合植物措施治理流动沙丘可达到立竿见影的效果....
抬起一只脚，弯曲脚趾，使脚尖朝下。Raise one foot, curl the toes and point the foot down-wards.她弯腰向下,左右手交叉触及脚趾.She reached down, touching her toes with opposite hands.我双腿麻木，脚趾疼痛。My legs felt numb and my toes ached....