direct control feature的用法和樣例：
例句
- The number of role blocks and explicit role mappings influences the access control performance.
角色塊和顯式角色映射的數量會(huì )影響訪(fǎng)問(wèn)控制性能。 - The results of simulation and experiment show that the performance of control becomes better by using this designment.
仿真和試驗結果表明，該控制方法能夠明顯改善控制性能。
