ensure
(US insure), / ɪnˈʃɔ:(r); ?@ ɪnˈʃuər; ɪn`ʃʊr/ v
1 [Tn, Tf] make sure; guarantee 确保; 保证; 担保
The book ensured his success. 那本书确定了他的成就.
Please ensure that all the lights are switched off at night. 夜间请务必将所有的灯关掉.
2 [Dn.n] make (sb) certain to get (sth); assure 使（某人）一定得到（某事物）; 保证得到
These pills should ensure you a good night's sleep. 服下这些药丸可保你睡一宿好觉.