I heard the news by the grapevine. I'm not sure.

这个消息我只是道听途说，不敢确定。

youdao

I heard the news by the grapevine. I am not sure.

我听到的这个消息只是道听途说，不敢确定。

youdao

Now, as in those far-off Civil War days, getting information by the grapevine remains something of a game.

现在，在内战早已远去的日子里，获取小道信息仍保留着鬼把戏的味道。

youdao

"No," you say,"it just can't be true! Who told you?" Comes the answer, "I got it by the grapevine."

VOA: special.2009.02.22

People began hearing the phrase by the grapevine to describe false as well as true reports from the battlefield.

VOA: special.2009.02.22

Now,as in those far-off Civil War days, getting information by the grapevine remains something of a game.

VOA: special.2009.02.22

Most especially in societies where gossip, the grapevine, is the primary method by which news spreads.

FORBES: The Pakistani 1 Rupee Coin Is Worth More Than 1 Rs

Let me begin by quoting a few lines from that classic song, I Heard it Through the Grapevine.

FORBES: The Best Investment Advice: Fundamental Truths About the Business of Managing Your Money (April 2, 2002 )