(这听起来有点像跑马场让个赌徒选赛马和骑手，压根没向赌马的人知会一声)。
This sounds a little like a racetrack allowing a gambler to select horses and jockeys to run in a race, without informing the other bettors.
我想知会您一声，如果Google预备在中国大干一场，我非常有兴趣和您谈谈。
I thought I'd let you know that if Google has great ambitions for China, I would be interested in having a discussion with you.
我只是希望知会您一声，我们今天店里的一些商品正在搞促销。
I just want to tell you that we have a promotion for various items in the store today.
应用推荐