嫦娥四号月球探测器在月球背面（暗面）降落并轻轻地着陆，揭开了人类太空探索历史的新篇章。
Chang'e 4 lunar probe landed on the moon's far side (dark side) and softly touched down, which opened a new page in history of mankind's space exploration.
人类可见的物质只占到整个宇宙总物质的17%，剩下的83%是所谓“暗的”，意味着它们不会释出或反射可测光。
The matter we can see makes up just 17% of matter in the Universe; the remaining 83% is "dark", meaning it does not reflect or emit detectable light.
这次使命将对月球内部从核心到表明的内部构造进行测绘，包括人类从未探索过的月球暗面。
The mission will map the moon from its core to its surface, including the far side of the moon which humans have never explored.
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