英文解释
           - n.
 - 1.tiny lobster-like crustaceans usually boiled briefly
 - 2.small freshwater decapod crustacean that resembles a lobster
 - 3.large edible marine crustacean having a spiny carapace but lacking the large pincers of true lobster
 
- v.
 - 1.make a retreat from an earlier commitment or activity