单词	drop-ball test
释义	drop-ball test 落球试验
随便看	hierarchical computation hierarchical computer network hierarchical computer system hierarchical concept hierarchical conference hierarchical conflict hierarchical conjugate gradient method hierarchical constraint hierarchical construction hierarchical control hierarchical control architecture hierarchical controller hierarchical control mechanism hierarchical control of power system hierarchical control system hierarchical coordination hierarchical corporate culture hierarchical corporate need hierarchical correlation hierarchical cosmology hierarchical course arrangement hierarchical court system hierarchical culture hierarchical cut hierarchical cybemetics