无人配送车在路测与运营过程中，需持续采集地图、交通流量、行人行为乃至城市基础设施的实时信息。
They are a safety net - it means that you can refactor the code (e.g. split or merge classes or functions) and tests still pass. If you can’t refactor anything without breaking the tests, something is not right.
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The Super Heavy booster managed to return to its launchpad roughly seven minutes after lift-off as planned, prompting an eruption of applause from ground control teams.