sponge

名词 sponge:

1. a porous mass of interlacing fibers the forms the internal skeleton of various marine animals and usable to absorb water or any porous rubber or cellulose product similarly used
2. someone able to acquire new knowledge and skills rapidly and easily
   同义词：quick study
3. a follower who hangs around a host (without benefit to the host) in hope of gain or advantage
   同义词：leech, parasite, sponger
4. primitive multicellular marine animal whose porous body is supported by a fibrous skeletal framework; usually occurs in sessile colonies
   同义词：poriferan, parazoan

动词 sponge:

1. wipe with a sponge, so as to clean or moisten
2. ask for and get free; be a parasite
   同义词：mooch, bum, cadge, grub
3. erase with a sponge; as of words on a blackboard
4. soak up with a sponge
5. gather sponges, in the ocean

1. It's a sponge.
   这是一块海绵。
2. I am cooking a sponge cake with jam filling.
   我在做果酱松糕。