多年生的

According to the habitat types, weed species can be induced into 5 species groups. In the edge habitat, species were almost perennials which can endure dankness. In abandoned habitat with debris, species were tall perennials of Compositae. In abandoned habitat with soil, species were almost annuals which can endure leanness. Short-lived species appeared in spring in the habitat with human disturbance taking no care of environment effects. Species which can endure trampling were prostrate perennials

林下—林缘型种组所包含的物种多是多年生耐阴湿物种；废弃空地型种组所包含的物种多是多年生菊科高茎草；废弃空地型所包含的物种多是一年生耐贫瘠物种，亦有草质藤本葎草；春季短寿命型种组所包含的物种多是冬季一年生物种，在春季短时间占据生境，不能很好地体现生境特征；耐践踏型种组所包含的物种多是多年生匍匐、耐践踏物种。

DNA C-values might be one of important indices in the evaluation of angiospermous invasiveness. To test this viewpoint, we compared DNA 1C-values and basic genome sizes in 3,676 angiosperms. The results suggest that:(1) the two nuclear values vary greatly among different groups, e.g., significantly higher in herbs than in trees, in monocots than in dicots, in perennials than in non-perennials;(2) the two nuclear values both have significant effects on plant invasiveness, especially in herbs, dicots, monocots, perennials, non-perennials, diploids, polyploids, Compositae, and Poaceae, while not significant in trees and Fabaceae.

DNA C值与被子植物入侵性密切相关，为考察应用DNA C值评估被子植物入侵性的可靠性和局限性，我们统计分析了全世界范围内3676种被子植物的DNA 1C值（配子未发生DNA复制时的染色体DNA含量）及基因组大小（单个染色体组的DNA 含量），结果表明：1）DNA 1C值和基因组大小在被子植物不同类群中差异极大，例如在草本植物中显著高于木本植物，单子叶植物显著高于双子叶植物，多年生植物显著高于非多年生植物；2）两项指标都与被子植物入侵性显著负相关，尤其是在草本植物、双子叶植物、单子叶植物、多年生植物、非多年生植物、二倍体、多倍体、菊科和禾本科中，然而在木本植物、豆科植物中其与植物入侵性无显著关系。

Large genus of annual or perennial herbs or shrubs of north temperate regions; largest genus in the family Leguminosae.

在北部气候温和的地区每年生的或多年生的草本或灌木的大属；豆科里的最大的属。

Densely hairy perennial having mostly triangular basal leaves and rose-purple flowers in panicled clusters.

浓密的多毛的多年生的植物，有三角形的叶子和圆锥花序的玫瑰紫色的花。

Hairy perennial of central United States having round deeply-lobed leaves and loose panicles of large crimson-purple or cherry-red flowers.

美国中部的多毛的多年生的植物，有圆的深深叶状的叶子和大的深红紫色或樱桃红色花的宽松的圆锥花序。

The change of plant functional types' importance value shows: with the succession, annual or biennial forbs rapidly decrease then slowly increase, but overall decrease; perennial forbs increase firstly and reduce afterward; perennial grasses increase linearly.

植物功能群重要值变化分析表明：随着演替的进行，1、2年生杂草先迅速减小后缓慢增大，但总体减小；多年生杂草先增大后减小；多年生禾草类线性增加。

In wetter habitats, forbs were more abundant and accounted for the majority of aboveground biomass, whereas grasses became more important in dryer habitats. Shrubs and sub-shrubs increased with decreasing soil water availability and their relative biomass rapidly increased in degraded steppe and sand dune; perennial grasses had significantly higherδ〓C values than other PFGs; the δ〓C values of perennial grasses and forbs increased with decreasing soil water availability, while those of shrubs/sub-shrubs showed an inverse trend.

在较湿润生境，多年生杂类草更加丰富并构成了群落地上生物量的绝大部分；而在较干旱生境下，多年生禾草在群落中起更重要的作用；随着土壤含水量下降，灌木和半灌木逐渐增多，且在退化草地和沙地中其相对生物量迅速增加；多年生禾草δ〓C值显著高于其它功能群；随着土壤水分可利用性降低，多年生禾草和杂类草的δ〓C值表现出增加的趋势，而灌木/半灌木则表现出相反的趋势。

The trend is not to segregate flowers in their own beds, but to plant what's called a "mixed border" in which small flowering trees like ornamental pears or shrubs like rhododendrons join perennials in a planting that can look attractive all season.

现在流行的趋势并不是把花卉单独隔离在他们自己的苗床内，而是种植成混搭的形式，比如把装饰性的梨树之类的小型开花乔木或者杜鹃之类的灌木与多年生的植物种植在一起，从而在一年四季内都能够吸引我们。

The wholecharacteristic behavior of kentucky bluegrass is better than that of tall fescue and perennial ryegrass; while tall fescue is better than perennial ryegrass.

关联度分析结果表明，草地早熟禾的整体坪用性状表现要比高羊茅和多年生黑麦草好，而高羊茅比多年生草地早熟禾好。

The whole characteristic behavior of kentucky bluegrass is better than that of tall fescue and perennial ryegrass; while tall fescue is better than perennial ryegrass.""""

关联度分析结果表明，草地早熟禾的整体坪用性状表现要比高羊茅和多年生黑麦草好，而高羊茅比多年生草地早熟禾好。

I'm gonna go pack my regular, long bathing suit.

我要去打包我那不起眼的超长泳裤

Random number generators are used in many areas, with the improvement of the computational ability of the computer.

随着计算机计算能力的不断提高，随机数发生器在许多领域有了更加广泛的应用。