妈妈告诉我在公园里不要和陌生人说话。

Mom told me not to talk to ___strangers in the park.

作为这个社区的新人，她还不认识任何邻居。

As a ___stranger in this neighborhood, she doesn't know any neighbors yet.

她对这种新技术完全陌生。

She is a complete ___stranger to this new technology.