什么是 conserve?To protect from loss or harm; preserve: calls to conserve our national heritage in the face of bewildering change. To use carefully or sparingly, avoiding waste: kept the thermostat lower to conserve energy. To keep (a quantity) constant through physical or chemical reactions or evolutionary changes.To preserve (fruits) with sugar.To economize: tried to conserve on fuel during the long winter. A jam made of fruits stewed in sugar.