在冈比亚中河区，中国援冈比亚农业技术合作项目组面向当地农户开展水稻联合收割机技术示范教学活动。
Now it is in position, the final tests, checks - and a dress rehearsal - will take place, before the go-ahead is given for the 10-day Artemis II mission that will see four astronauts travel around the Moon.
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The story starts with quantum field theory, which is incredibly complex, but the simplified version is that even empty space is filled with fields that could govern the interactions of any quantum objects in or near that space. You can think of different particles as energetic excitements of these fields—so a photon is simply an energetic state of the quantum field.