原级：requisite
1. Another 15 centers are planning in situ redevelopment or have commenced work already to fulfill licensing requisites.
2. Atomic timepieces are a crucial tool in navigation systems as their accuracy and stability are key requisites.
3. To the surprise of many people, employment requisites have changed fast.
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4. The city has the requisites to become a regional higher education and medical services hub, yet land supply has become a bottleneck that blocks further development.