| 1. | Earthworm channels greatly aid root growth .
蚯蚓洞穴极有助于植物根系生长。 |
| 2. | At maturity the root system is extensively nodulated .
在成熟时，根系普遍具有根瘤。 |
| 3. | Root systems have had to be excavated without the aid of water .
根系必须在不用水的情况下掘取。 |
| 4. | The root system of the apple tree grows in proportion to the top .
苹果根系的生长与树冠生长成正比。 |
| 5. | The fungus can persist in stumps and roots for many years .
这种真菌宿存于树木的伐桩和根系中许多年。 |
| 6. | If shoots grow rapidly the root growth rate decreases markedly .
如果新梢生长很快，则根系生长显著减慢。 |
| 7. | Roots must have good aeration in order to function properly .
为了根系机能正常活动，必须有个良好的通气条件。 |
| 8. | Nematode damage to the soybean roots is characterized by coarse roots .
线虫破坏大豆根系的特征是：根系粗糙。 |
| 9. | The root system of the soybean consists of a taproot formed by the radicle .
大豆的根系包括由胚根形成的主根。 |
| 10. | The nutrient may be intercepted by the roots as they grow through the soil .
当根系穿过土壤生长时，可以截获营养物质。 |
