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enforce [enforced, enforcing, enforces]▼(to keep up)verb[UK: ɪn.ˈfɔːs] [US: en.ˈfɔːrs]
maintain [maintained, maintaining, maintains]▼(to keep up)verb[UK: meɪn.ˈteɪn] [US: men.ˈteɪn]
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