rapiden.直达长途客车rapidadj.短时间发生的；急速的；迅速的；快的；险峻的n.急流；湍滩rapid information有效情报rapid acquisition快速捕获rapid sand filter快速砂滤池rapid orientation快速定向rapid degradation迅速降解rapid measurement快速测定rapid-quenching快淬rapid-rise test快速升压试验rapid calibration快速标定rapid inactivator快速代谢型, 快速灭活型