true interest meaning in English

纯利息
真实利息

Did a or b ' s opening statements reveal any true interests
有任一方的开场说明揭示出实质的利益吗？
The true interest of small monster is extensive , i discover your recreational time really a lot of
小怪怪真的兴趣广泛,我发觉你的空余时间真的很多
Direct selected songs whole function karaoke , let you fully the sing , and proceeds karaoke game , thrilling enjoy the karaoke s true interesting aspect
直接选曲全功能卡拉ok ，让你尽情欢唱，并进行卡拉ok比赛，畅快享受卡拉ok的真情趣