如果一个不知名的人进入家中，摄像头就会向主人发送警告，并在主人的智能手机上响起警报。
If an unknown person enters a home, the camera will send the owner a warning that will cause an alarm to sound on the owner's smartphone.
你最好的回应一个不知名的人的请求只是礼貌地下降。
Your best response to a request from an unknown person is simply to decline politely.
我仔细地看了很久，眼前只有一睹黑魆魆的大墙，我甚至怀疑是不是一个不认识的人因为不知名的原因把一块黑毯子挂在了我的门上。
As I looked harder and longer, as my eyes got used to the solid black wall, I wondered if an unknown person for an unknown reason had draped a black blanket over our door.
他在国际舞台上原是一个不知名的或不被注意的人物，在国内事务中也只是一个普通的角色。
He had been unknown or unnoticed in the world drama and played a modest part in domestic affairs.
他在国际舞台上原是一个不知名的或不被注意的人物，在国内事务中也只是一个普通的角色。
He had been unknown or unnoticed in the world drama and played a modest part in domestic affairs.
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