单词：herons
音标：['herənz] ；
n. <动>鹭( heron的复数形式 )
n. Greek mathematician and inventor who devised a way to determine the area of a triangle and who described various mechanical devices (first century)
n. grey or white wading bird with long neck and long legs and (usually) long bill
n. grey or white wading bird with long neck and long legs and (usually) long bill