lóu / tī / shàng / chuán / lái / yí / zhèn / tuó / tuó / shēng / hái / zi / men / lì / kè / ān / jìng / xià / lái

楼梯上传来一阵橐橐声，孩子们立刻安静下来。

A series of heavy footsteps came from the stairs, and the children immediately fell silent.