quicksand

n.流沙

questioningly, questionnaire, questions, queue, queue up, qui vive, quibble, quiche, quick, quick march, quick-change, quick-freeze, quick-minded, quick-tempered, quick-witted, quicken, quickie, quicklime, quickly, quickness, quicksilver, quickstep, quid, quid pro quo, quiescence, quiescent, quiet, quieten, quietism, quietist, quietly, quietness, quietude, quietus, quiff, quill, quilt, quin, quince, quincentenary,