那是因为物质和反物质本质上是对立的。
That's because matter and antimatter are basically opposites of each other.
那是因为物质和反物质基本上是对立的。
That's because matter and anti-matter are basically opposites of each other.
那听起来可能很奇怪，但事实是：在大爆炸的那一刻，物质和反物质都在很短的时间内被创造出来。
That may sound odd, but the fact is at the moment of the big bang, both matter and antimatter were created for a short time.
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