短语 to keep an ear to the ground 意思是密切关注新的信息或潮流。

例句

David had his ear to the ground when it came to news about the latest and best technology to buy.

If Susan had kept her ear to the ground, she wouldn't have missed the opportunity for a promotion.

Don't worry, I'll keep my ear to the ground and let you know what's happening as soon as possible.

请注意

To have a word in someone's ear 意思是悄悄地告诫某人或提建议

Did you hear what Steve just said to Mandy? I'd better have a word in his ear about it later on.