查询词典 weeds

The relationship between weed invasion and intensity was analysed on sown pasture mixed by whiteclover and perennial ryegrass,and the preliminary results were that 1the number of invasive weeds ismainly dependent on grazing intensity;2the trend of species diversity was successively increase-decrease-increase when the grazing intensity is increase;3 principal invasion weed species are Lysimachiahemsleyana, Eragrostis nigra, etc,8 species;4the sown pasture in question is pioneer stage of the recoverysucce...

本文分析了白三叶草十多年生黑麦草混播人工草地上杂草入侵与放牧强度之间的关系，得出如下初步结论：1）杂草入侵的种数主要决定于放牧强度；2）α物种多样性随放牧加重而有增－减－增的趋势；3）入侵的主要杂草种为点腺过路黄等8个种；4）所论人工草地都处在恢复演替的先锋阶段，因而草地退化的进程还是能予以遏制的。

May be the man you hoe with is inclined to race; then, by gorry, your mind must be there; you think of weeds.

也许跟你一起耘地的人打算跟你比赛；好啊，心思就得花在这上头了：你想到的只是杂草。

I/hm~2 were 77%、89% and 95%, respectively; to gramineous weeds were 40%、54% and 63%, respectively

田间试验结果表明：10%氟嘧磺隆可湿性粉剂每公顷7.5、15和30克有效成分对玉米田阔叶杂草的防效分别为77%、89%和95%，对禾本科杂草的防效分别为40%、54%和63

The key technique of deferred sowing wheat yield-increasing was controlled the gramineous weeds.

防除禾本科杂草是延期播种小麦增产的关键技术。

In some sites,plantations were completely replaced by local weeds .And thus a new landscape developed with the function of preserving soil and slope and beautifying the scene,such asSetaria viridis and Imperata cylindraca var. major .

4不同的人工种植植物品种在高速公路环境下的存活率是具有显著性差异的：大叶樟和小叶女贞相对于迎春具有显著性差异，大叶樟与小叶女贞之间则差异性不显著。

Some weeds seem inextirpable.

有些种子似乎很顽强。

Bidens pilosa var. radiata, one of the rapid expanding invasive weeds, has become prevailing throughout Taiwan. A study on the result enhanced by the breakdown of geographic isolation with the native varieties in genetic variation, population structure and introgressive hybrization is really in need. In this study the genetic variation and population structure among the varieties of Bidens pilosa complex were studied using ISSR markers.

在台湾Bidens pilosa种群在外部形态及分布上均非常类似，加上大花咸丰草又属极具侵略性的新归化种，在与其他自生变种又无明显隔离下，是否增加种间之交流与渐渗杂交之机会及对族群结构的影响，实有深入探讨之必要。

In these alien weeds, Oenothera laciniata is an alien weed new to the centre of Zhejing Province, and Lactuca serriola new to eastern China.

金华市郊外来杂草的原产地主要是美洲(59％)和欧洲(22％)，应注意控制对这些原产地物种的引种栽培。

A man of words and not of deeds is lile a garden full of weeds.

光说空话不做事，犹如花园光长刺。

A mand of words and not of deedsis like a garden full of weeds.

杂草野草一个人只说不做就像一个长满野草的花园。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。