(noun.) an elastic material obtained from the latex sap of trees (especially trees of the genera Hevea and Ficus) that can be vulcanized and finished into a variety of products.
(noun.) any of various synthetic elastic materials whose properties resemble natural rubber.
(adj.) returned for lack of funds; 'a rubber check'; 'a no-good check' .
校对:卢埃林
手打:马吉