re·new·able /-ˈnuəbəl, ˈnju-/
(a.)可更新的;可恢復的
Re·new·a·ble a. Capable of being renewed; as, a lease renewable at pleasure.
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renewable
adj 1: that can be renewed or extended; "a renewable lease";
"renewable subscriptions" [ant: unrenewable]
2: capable of being renewed; replaceable; "renewable energy
such as solar energy is theoretically inexhaustible"