It found that many farmers have better harvests, better weed control and fewer losses from insect damage compared to traditional crops.

VOA: special.2010.04.27

We're not using them to weed you out, we're using them to help you learn.

我们不会用他们来淘汰你们，而是用他们来帮助你们学习。

麻省理工公开课 - 计算机科学及编程导论课程节选

After the general's first victory, New York political leader Thurlow Weed happened to meet Taylor's brother on a Hudson River steamboat.

VOA: special.2009.03.05

Weed thought General William Henry Harrison, one of the candidates in 1836, might be the man the Whigs needed.

VOA: special.2009.01.22

He says a dense, competitive crop that quickly shades the soil from the sun will help reduce weed growth.

VOA: special.2011.07.26

After the potato plants appear, organic mulch can be spread around to hold moisture, help suppress weed growth and cool the soil.

VOA: special.2009.03.10

The study found that many farmers have better harvests, better weed control and fewer losses from insect damage compared to traditional crops.

VOA: special.2010.05.18

The seeds can also resist the Striga weed, a big cause of crop failures in Africa.

VOA: special.2009.07.07

As he once told the Houston Chronicle, "A Weed Eater comes along once in a lifetime."

VOA: special.2011.07.19

Two of the plants growing in the wild showed resistance to both kinds of weed killers.

VOA: special.2010.09.14

By comparison, each weed plant can produce tens or even hundreds of thousands of seeds.

VOA: special.2010.08.10

Weed also thought of General Winfield Scott, who had kept the border with Canada quiet.

VOA: special.2009.01.22

Weed finally decided that Scott might be a better candidate than Harrison or Clay.

VOA: special.2009.01.22

Bill Curran at Penn State in University Park,Pennsylvania, is a professor of weed science.

VOA: special.2010.08.10

The seeds need light to grow, so blocking the sun will reduce weed growth.

VOA: special.2010.08.10

But each weed plant can produce tens or even hundreds of thousands of seeds.

VOA: special.2009.05.26

Chemical weed killers or natural treatments like corn gluten can suppress weed growth.

VOA: special.2010.08.10

Bill Curran is a professor of weed science at Penn State,in University Park,Pennsylvania.

VOA: special.2009.05.26

remove DDT the next will be all insecticides, after that it will be all the weed-killers and the fungicides and then the fertilizers, if the hysteria prevails.

VOA: special.2009.11.10

Glyphosate is a chemical used in Round-Up and other weed killing products.

VOA: special.2010.04.27

Preventing the spread of weeds is an important part of weed management.

VOA: special.2010.08.10

Thurlow Weed, one of the important Whig leaders in the state of New York, remembered how the people had loved Jackson, the hero of the War of 1812.

VOA: special.2009.01.22

Weed asked Joseph Taylor if his brother was a political man.

VOA: special.2009.03.05

The heat will kill many, though not all, weed seeds.

VOA: special.2009.05.26

The heat will kill many, though not all,weed seeds.

VOA: special.2010.08.10

Weed,however, did not think his proposal was foolish.

VOA: special.2009.03.05

It can also limit weed growth.

VOA: special.2009.06.30

When is a plant considered a weed?

VOA: special.2009.05.26

Weed made a quick decision.

VOA: special.2009.03.05

"We really need to get after this weed resistance problem right away before we lose the efficacy of that technology."

VOA: standard.2010.04.15