It had a picket-fenced garden strewn with children's toys, sandpits and colorful flowers.

尖木桩做篱笆的花园里到处都是他们的玩具、沙坑和鲜花。

If sandpits are near bridge location, its evolution when subject to suitable shear stress of the flow will rapidly cause the bridge foundation instability.

采沙坑距大桥较近时，在水流剪应力作用下沙坑演变可很快造成大桥基础变浅，影响大桥的正常安全运用。