a rubber tree的用法和样例：
- She used a rubber band to tie her hair.
- Put a rubber band round these books.
- He rigged a rubber hose to the tap in the kitchen.
- He sponged a wrong letter off with a rubber.
- They worked on the farm, tapping rubber trees.
- He has a rubber in his pencil case.
a rubber tree的相关资料：
A/D a AOQL Average Output Quality Level A markedly short-lived thing. a hierarchically obedient society a mild - mannered supervisor. a monarch without political power A large or ungainly automobile. a long-term/short-term let a triglyceride of stearic acid. A visible change of expression. a deliberate attempt to stonewall