| 1. | There are at least 800 naturalized aliens .
归化的外来种起码也有800种。 |
| 2. | Tree planting is almost automatically confined to exotics .
树木栽植几乎主动地局限于外来种。 |
| 3. | Exotics are most useful in regions in which the native flora is deficient .
在当地植物种类贫乏的地区，外来种最为有用。 |
| 4. | Exotic legume species in china
中国豆科植物外来种之研究 |
| 5. | The spartina alterniflora is the extra category that is fit to the tidal flat in jiangsu
互花米草人工盐沼就是适合于在江苏滩涂重建盐沼的外来种。 |
| 6. | Also , heavy human traffic in the worlds ' protected areas has changed them forever , introducing non - native species , air pollution and trash
同时，人潮也对全世界的保护区带来了不可挽回的改变，包括外来种、空气污染以及垃圾。 |
| 7. | Today some one hundred native species are being used for planting ; and in the areas unsuitable for slow growth native species , a mixture of proven native and hardier exotic species are used
如今，用于植林的本地树木超过一百种某些地点若不宜成长缓慢的本地树种，则采混合方式，种植已证实能生长的原生树和韧力较强的外来种。 |
| 8. | Earthworm activities and their functions in ecosystem are determined by various factors such as ecological groups of earthworms , population size , vegetation , parent materials of soil , climate , time scale , and history of soil utilization
蚯蚓外来种入侵与生态系统的关系以及蚯蚓对全球变化的响应和影响是两个值得关注的问题。 |
| 9. | In calling for the return of terminator genes , supporters of gm crops note that genetically enhanced plants have as much or more potential as exotic species to invade surrounding ecosystems and drive wild populations into extinction . “ terminator technology is a near perfect way of controlling unwanted gm spread , ” insists geneticist william m
为了让终结者基因重见天日，支持基改作物人士提出的理由是，基因经过强化的作物要比外来种更有潜能侵犯周遭的生态系统，而造成野生族群的灭亡。 |
| 10. | The position about three kinds of lactuca brevirostris was discussed . the lanceolate - leaf lactuca brevirostris and the linear - leaf lactuca brevirostris were possibly two subspecies and two kinds of lanceolate - leaf lactuca brevirostris were possibly different species , lanceolate - leaf lactuca brevirostris 2 might be a variant or an external species
本研究还讨论了三份野莴苣的地位，披针叶野莴苣与线叶野莴苣可能是不同的亚种；两种披针叶野莴苣可能是不同的种，其中，披针叶野莴苣2可能是个变异种或外来种。 |
