单词：sponges
n someone able to acquire new knowledge and skills rapidly and easily
n a follower who hangs around a host (without benefit to the host) in hope of gain or advantage
n primitive multicellular marine animal whose porous body is supported by a fibrous skeletal framework; usually occurs in sessile colonies
v wipe with a sponge, so as to clean or moisten
v ask for and get free; be a parasite
v erase with a sponge; as of words on a blackboard
v soak up with a sponge
v gather sponges, in the ocean
sponges的用法和样例：
例句
- He always sponges off others.他总是揩别人的油。
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