艾娃是我们班新来的女生，她的名字意思是'鸟'。

___Ava is the new girl in our class, and her name means 'bird'.

她在虚拟会议中换了一个新的头像。

She changed her ___avatar for the virtual meeting.

我们新安装的音频视频助手大大提高了会议效率。

The new ___AVA we installed has greatly improved meeting efficiency.