查询词典 persistent

We find the trivial equilibrium is always unstable, which implies that the system is persistent. It is shown that the system is uniformly persistent when positive equilibrium exists.

此外，我们还证明了当正平衡点存在时系统是一致持续生存的，并利用极限系统理论和杜拉克判剧研究了边界平衡点全局稳定性，这表明此时捕食者种群将绝灭。

Fruit a drupaceous capsule, ellipsoid-ovoid, puberulent, 1-seeded, perianth persistent, style persistent and developing into a beak.

果具核果蒴果，椭圆形卵球形，被微柔毛，1种子，宿存的花被，花柱宿存的和发展成为一喙。

Fruit a loculicidal capsule enveloped by persistent perianth, terminating in persistent style and stigma.

一室背开裂蒴果被宿存的花被包围，在宿存的花柱和柱头上顶生。

Trees evergreen; trunk monopodial, straight; branches nearly whorled; branchlets ridged and grooved, with each leaf borne on a persistent, peglike base; short branchlets absent; winter buds ovoid, conical, or subglobose, resinous or not, scales on terminal buds recurved or not, persistent at base of branchlets.

常绿乔木树干单轴分枝，直；分枝差不多轮生；小枝具脊和凹槽，有每叶生于一持久，钉状基础；短小枝无；卵球形，圆锥状的冬芽，或近球形，与否树脂，由顶芽开出的鳞片与否，宿存在基部的小枝。

To get more insight into the mechanism and kinetics of the RAFT process,it would be helpful to build a small molecular model reaction mimicking the RAFT process but free of a chain-propagation event. We hereby propose a model cross reaction between dithioester and alkoxyamine as a probe of the RAFT process,in which the alkoxyamine plays the role of the radical source.The generating rate of the transient alkyl radical and the nitroxyl radical can be described by the law of persistent radical effect.Thus,the advantage of the model cross reaction is that it affords a radical concentration determined by the known equation of the persistent radical effect.

为了更深入的理解RAFT聚合过程，我们构建了一个模型反应：即由烷氧基胺与双硫酯进行交换反应，烷氧基胺均裂产生的烷基自由基将会向双硫酯进行链转移，双硫酯的引入对纯烷氧基胺分解动力学造成的影响可以提供RAFT过程的许多信息。

Also, persistent nonsuppression in the DST as well as persistent elevation of CSF CRF concentrations, despite symptomatic improvement of MD with treatment, is associated with risk for early relapse.

尽管治疗后抑郁症状得到改善，但DST中皮质醇持续不受抑制或脑脊液中CRF浓度持续升高都表明存在早期复发的危险。

In this paper, we use 500hPa geopotential height to study the abnormal disturbance for the North-ern Hemisphere poleward of 20°N summertime from 1957 to 1979, special focusing on persistent anom-alies which persistent time are longer than that of synoptic scale variability.

本文利用23年夏季3个月的500hPa位势高度场，对20°N以北的热带以外地区的位势高度异常进行了分析，着重研究了持续时间超过天气尺度扰动时间（大约1周）的持续异常。

Stamens 5-10 or numerous; filaments generally free and persistent, or anthers sessile; anthers basifixed, longitudinally dehiscent or poricidal; staminodes present or not, sometimes persistent, awl-shaped, spatulate, or petaloid, sometimes connected into a tube.

雄蕊5-10或者多数；花丝通常离生并且宿存，或花药无柄；花药基着，纵向开裂或；退化雄蕊有或无，有时宿存，锥形，匙形，或者花瓣状，有时合生成管。

Needles 2(or 3) per bundle, dark green, semiorbicular in cross section, 6-15 cm × 1-1.5 mm, resin canals 5-9, marginal, rarely 1 or 2 median, base with persistent sheath initially 1-2 cm. Pollen cones 5-9 mm. Seed cones shortly pedunculate, initially green, turning yellowish brown to brown at maturity, ovoid to ovoid-globose, 2.5-9 × 4-9 cm, usually persistent for a few years.

每包的针叶2(或3)，深绿色，半圆形的在横断面上， 6-15厘米×1-1.5毫米，树脂道5-9，边缘，很少1或2 中位数，基部具宿存鞘最初1-2 厘米雄球花5-9毫米球果有短花序梗，最初绿色，转身成熟时到棕色黄棕色， 2.5-9 * 4-9 厘米，几年的通常宿存。

Infection by baculoviruses not always results in insect death, and persistent baculoviruses are popular haboured in insect populations. Moreover, the persistent infection can be transformed to a replicative and infective state caused by stress factors, which can cause epizootics in outbreak populations.

杆状病毒感染昆虫宿主并不一定导致昆虫死亡，其持续感染在昆虫种群中普遍存在，且在某些刺激条件下，持续感染可被激活为增殖性感染并引发病毒流行病爆发。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷