clamp-down

n sudden policy of increased strictness in preventing or suppressing sth （为防止或压制某事而突然采取的）严格的政策.

civvies (also civies), Civvy Street, cl, clack, clad, cladding, claim, claimant, clairvoyance, clairvoyant, clam, clambake, clamber, clammily, clamminess, clammy, clamor, clamorous, clamour (US clamor), clamp, clan, clandestine, clang, clanger, clangorous, clangour (US clangor), clank, clanking, clannish, clannishly, clannishness, clansman, clap, clap eyes on, clapboard, clapper, clapper-board, claptrap, claret, clarification,