adj. 某一;确信;无疑的;有把握的;必然的>> 例句 - For the first time, I was certain that I was going to survive in this world.
adj. 含糊的;无常的;靠不住的;迟疑不决的>> 例句
vt. 发给证明书;以证书形式授权给…;用证书批准>> 例句
adj. 被证明的;有保证的;具有证明文件的>> 例句
- I deserve to get meetings in order to ascertain and understand..