If a secure baby's mother left the room he would start crying, but as soon as she returned he calmed down and started to play again.

如果一个“安全型”婴儿的妈妈离开房间，他马上就哭起来，但妈妈一旦回来，他就能冷静下来，又开始玩起来。

youdao

If a secure baby's mother left the room he would start crying, but as soon as she returned he calmed down and started to play again.

如果一个“安全型”婴儿的妈妈离开房间，他马上就哭起来，但妈妈一旦回来，他就能冷静下来，又开始玩起来。

youdao