I think it's somewhat clear that with this narrower meaning, we can group a system in modules, but still have a full view of it that allows us to study its reliability and correctness at the whole system level, because there's no “abstracting” going on.
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南大药业是国内“尿激酶原料药制剂”一体化龙头企业，其核心产品注射用尿激酶制剂连续多年占据国内医院端市场占有率第一。这家2024年通过重大资产重组纳入麾下的子公司，如今已成为公司连年亏损背景下的盈利救命稻草。