反物质云由于其自身发射的伽玛射线而显现出来，当单个的反物质粒子遇到它们正常物质的对应体（这里是正电子遇到电子）彼此互相消灭了对方。
The cloud shows up because of the gamma rays it emits when individual particles of antimatter, in this case positrons, encounter electrons, their normal matter counterpart, and annihilate one another.
反物质云由于其自身发射的伽玛射线而显现出来，当单个的反物质粒子遇到它们正常物质的对应体（这里是正电子遇到电子）彼此互相消灭了对方。
The cloud shows up because of the gamma rays it emits when individual particles of antimatter, in this case positrons, encounter electrons, their normal matter counterpart, and annihilate one another.
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