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1·The most weed species were Gramineae, Cyperaceae, Compositae, Scrophulariaceae, Alismataceae and Lythraceae.

杂草种类较多的科依次为禾本科、莎草科、菊科、玄参科、泽泻科、千屈菜科等。

2·Herbicide could decrease weed species and inhibit biomass growth significantly in non-tillage field.

施用除草剂可减少免耕玉米田杂草种类，抑制杂草生物量的增长。

3·Application of herbicides to paddy field at Yushanwu was widespread which resulted in less weed species than that at Chengbei.

禹山坞稻田普遍使用化学除草剂，杂草种数明显少于城北村，水竹叶成为禹山坞稻田的优势种；

4·The families including the most weed species were Gramineae, Cyperaceae, Compositae, Scrophulariaceae, Alismataceae and Lythraceae.

其中，杂草种类较多的科依次为禾本科、莎草科、菊科、玄参科、泽泻科、千屈菜科等。

5·The results showed that occurrence and distribution of weed species were related closely with the location, soil water contents and management of the turf.

调查结果表明，南京市草坪杂草的发生和分布与草坪所处地理位置、土壤水分条件及管理水平有密切关系；

6·Investigation on the weed species and control techniques were done in 2001-2003. Speices and community distribution of weed had been found in farmland in Huaibei area.

2003年，进行了农田杂草调查及防治技术研究，基本摸清了淮北地区农田杂草种类和群落分布。

7·Evaluation of novel transgenic lines is initially in small-scale field trials, where it is likely that rare events, such as hybridization with weed species, may have insignificant consequences.

新的转基因品种的最初评估是在小规模田间试验中进行的，在此试验条件下，稀有事件例如与杂草种的杂交可能不会产生明显的结果。

8·The number of weed species occurred and population size of each weed species depended directly on the management of the turf, whereas the turf location played the secondary effects on the weeds.

其中，地理位置是草坪杂草分布差异的间接原因，杂草种类的多少及每种杂草的数量与管理水平有直接的关系。

9·The dairyman, who had thrown himself into abstraction to better realize the taste, and so divine the particular species of noxious weed to which it appertained, suddenly exclaimed

奶牛场老板聚精会神地在那儿品味着黄油的味道，想分辨出造成这种怪异味道的是一种什么莠草，过了一会儿他突然大声说

10·Another drawback is that the side-effects are largely unknown and potentially horrible if, for example, a “weed” species were to take advantage of a changed ecosystem.

另一个缺点则是，这种计划的副作用在很大程度上是未知的，而且有可能是可怕的。 比如说，在这种被改变了的生态环境中，可能会有杂草类的无种能从中得益以对海洋造成更大的危害。