He says a dense, competitive crop that quickly shades the soil will help suppress many weeds.
他说，经过密植的具有竞争力的作物会很快遮蔽土地，这将有助于抑制杂草生长。
He says a dense, competitive crop that quickly shades the soil will help suppress many weeds.
密集种植也是控制杂草的一种自然方法。
Since there is a higher chance of such close encounters in dense star clusters, we might expect to detect more brown dwarfs there, he says.
他还说，既然在稠密的星簇里，近距离接触产生的机会比较高，由此我们可以期待着检测到更多的棕矮星。
He says a dense, competitive crop that quickly shades the soil from the sun will help reduce weed growth.
VOA: special.2011.07.26
He says a dense, competitive crop that quickly shades the soil will help suppress many weeds.
VOA: special.2009.05.26
He says a dense,competitive crop that quickly shades the soil will help suppress many weeds.
VOA: special.2010.08.10
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