block and tackle

滑轮组

blinkered, blinkers, blinking, blip, bliss, blissful, blissfully, blister, blister pack, blisteringly, blithe, blithely, blithering, blitz, blizzard, bloated, bloater, blob, bloc, block, block diagram, block letter (also block capital), block vote (also card vote), block-buster, block-busting, blockade, blockage, blockhead, blockhouse, bloke, blond, blood, blood bank, blood count, blood feud, blood group (also blood type), blood orange, blood pressure, blood sports, blood test,