hái / zi / men / chuān / shàng / xīn / xiào / fú / zài / jìng / tóu / qián / yí / ge / ge / liě / kāi / zuǐ / xiào

孩子们穿上新校服，在镜头前一个个咧开嘴笑。

The children put on their new school uniforms and grinned one after another in front of the camera.