安妮把床铺都整理好，然后把幼儿室收拾停当。Anne made the beds and tidied up the nursery.学步幼儿的蹒跚脚步a toddler's first few halting steps幼儿游戏组给孩子很多启发.The playgroup provides plenty of stimulation for the children....
The pith of this stemlike stele appears rather strongly like collenchyma tissue.茎状中柱的髓显得颇强健,像厚角组织.Collenchyma cells have thick walls that are especially developed at the corners of the cell.厚角组织细胞尤其在细胞的各个角上具有厚壁....