Will you explain to me, please, the meaning of "broken ground" in the following fragment:
"Until recently antimatter has been created only in very small amounts (a few atoms at a time). But CERN has now broken ground on its new Antiproton Decelerator–an advanced antimatter production facility that promises to create antimatter in much larger quantities."
Thank you in advance.
Re: broken ground
Made progress in a new area.
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