VOA慢速英语:Ideas for Getting a Firm Grip on Weed Control

短语讲解：

1. Weeds compete with plantings for water and nutrients.

compete with与…抗争
例句：It is difficult for a small grocery store to compete with a supermarket.
小商店很难与超市抗争。

2. A crop plant generally produces several hundred seeds. But a weed plant can produce tens or even hundreds of thousands of seeds.

hundreds of thousands of 几十万,无数,成千上万的
例句：The city subway carries hundreds of thousands of passenger a day.
市内的地下铁每天运载数十万乘客。

3. Eradicating weeds means that you have to remove all the seeds and roots so the plants will not grow back.

grow back重新长出
例句：All her hair was burned off in the fire, but the doctors have promised that it will soon grow back.
她的头发在大火中烧掉了, 但医生保证她的头发还会长起来的。

4. A more common way to deal with weeds is to control them enough so that the land can be used for planting.

deal with应付, 处理; 对待
例句：There are many difficulties to be dealt with when starting a new business.
开展一项新业务时, 有许多困难需要解决。
be used for用来做…
例句：Wood is used for making paper.
木材用于造纸。

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

shade from挡, 遮(光或热)
例句：She raised her hand to shade her eyes from the sun.
她抬起手遮住眼睛上方以挡住阳光。

6. Other controls include turning over the soil, pulling the weeds or covering them with mulch made of wood, garden waste or other material.

turn over (使)翻转; 调转
例句：The soil must be thoroughly turned over before planting.
一定要先把土地深翻一遍再下种。
cover with用…遮盖住, 用…填满
例句：The field is covered with snow.
田野一片积雪。

7. But even mulch has its limits. Natural resource specialists point out that weeds can be transported in mulch.

point out指出
例句：He pointed out that there was little chance of success.
他指出很少有成功的机会。

8. Insects and other organisms can also act as biological controls.

act as担当…; 起…的作用
例句：An oar often acts as rudder.
桨常可起舵的作用。

9. Farm vehicles should be kept out of areas with weeds.

keep out (使)留在外面
例句：They shut the door and meant to keep us out.
他们关上门, 存心不让我们进去。