The linear time-invariant filter can' t improve SNR of single frequency component.

线性时不变滤波不能提高单一频率分量信噪比。

youdao

"I think that the Americans want to improve their relations with Syria to weaken Iran and to further isolate it in the region, so I don't think the Americans need Syria as a mediator with Iran, because that would improve relations between Tehran and Damascus,"

VOA: standard.2009.03.18

And it still didn't improve my impression of him but I like his stuff.

这并没有改善我对他的印象，但是我喜欢他的作品。

喜欢毕加索吗？ - SpeakingMax英语口语达人

We aren't professionals, so every year there are things that is flamboyant and other things that we want to improve.

我们不是专家，所以每年,都有很出彩的东西,还有其他一些我们想提高的地方。

麻省理工公开课 - 媒体、教育、市场课程节选

In one chapter he describes experiments suggesting that large bonuses won't improve executive performance.

FORBES: Magazine Article

As appealing as cost cutting sounds, it can't improve returns except within the shortest time frame.

FORBES: Leadership

The farmers say they want to stay, but if things don't improve, they will consider leaving.

ECONOMIST: Ethiopia