thousands of em
成千上万的人
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The outer cells become thin membranes that form around the baby. The cells multiply thousands of times and move to new positions to eventually become the embryo (pronounced: em-bree-o).
外层细胞发育成厚厚的膜并最终包裹着胚胎盘，细胞以成千上万的倍数增长并最终形成胚胎。
youdao
应用推荐
模块上移
模块下移
不移动