Sit up straight, back erect, focus on your breathing.

身体坐直，背部一定要直立，注意力放在呼吸上。

youdao

Generally more than three months of the baby can hold up erect.

一般三个月以上的孩子才能竖抱起来。

youdao

Generally more than three months of the baby can hold up erect.

一般三个月以上的孩子才能竖抱起来。

youdao