Many unusual signals from space remain unidentified.
许多来自于太空的不寻常信号都尚未确认。
All the cultural relics of Chinese origin, or of unidentified origin, or of foreign origin that remain in the Chinese inland waters and territorial waters;
遗存于中国内水、领海内的一切起源于中国的、起源国不明的和起源于外国的文物；
An unidentified plane has crashed to the ground and exploded in eastern China, state media reports, but the accident remains shrouded in mystery and potential casualties remain unknown.
一架身份不明的飞机坠落到中国东部地区的地面，中国国家媒体报道其发生了爆炸，但事故仍然笼罩在神秘之中，潜在的伤亡目前仍然不明。
An unidentified plane has crashed to the ground and exploded in eastern China, state media reports, but the accident remains shrouded in mystery and potential casualties remain unknown.
一架身份不明的飞机坠落到中国东部地区的地面，中国国家媒体报道其发生了爆炸，但事故仍然笼罩在神秘之中，潜在的伤亡目前仍然不明。
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