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COMPOUNDS
bậc thềm 
flight of steps, perron
thềm floor
thềm lục địa continental shelf; offshore region, outside edge
trước thềm before, in front of, on the verge, threshold of
trước thềm thế kỷ at the turn of the century
bậc thềm flight of steps, perron thềm floor thềm lục địa continental shelf; offshore region, outside edge trước thềm before, in front of, on the verge, threshold of trước thềm thế kỷ at the turn of the century