1. We were just innocently chatting when I realized someone was eavesdropping on our conversation.
（我们只是无心聊天，突然发现有人在偷听我们的对话。）
2. Eavesdropping is considered a breach of privacy and is illegal in many jurisdictions.
（窃听被认为是侵犯隐私的行为，在许多司法管辖区都是非法的。）