: a person who habitually lives at the expense of others; sponger（寄生虫） : existing in, taking place in, or characteristic of the open air; outdoor（户外的，野外的） : done finally in desperat...
Although not nearly as graceful as sponging dolphins, "which are really elegant in their moves," Patterson says, the human sponger nonetheless managed to scare up a hidden prey fish every 9 minutes.