短命

This study selected the ephemerals which grow in the Gurbantunggut Desert Area as the object of the study, which is based on the field sampling and the bourgeoning experiment in laboratory, The distributing , bourgeoning status,density, diversity of the soil seed banks and its relationship with vegetation showed in this area sand dunes were studied.

采用野外定点取样和室内萌发相结合的试验方法，研究了短命植物在沙丘不同部位的空间分布、萌发状况、密度、物种多样性及土壤种子库生物多样性与地上植物多样性的关系。

Aims Spring ephemerals characterized by very short-term growth rhythm and specific biological traits in the Junggar Desert of China play an important role in succession of the desert plant community, maintenance of the desert biological diversity and conservation of water and soil in desert.

准噶尔荒漠分布的早春短命植物不仅具有十分独特的生物学特点，而且在荒漠植物群落演替、物种多样性维持及土壤改良与防治水上流失等方面具有重要的生态学价值。

The correlation was attributed to the three types of plants:(1) the ephemerals plants;(2) the plants that had the transient soil seed bank or the aerial seed bank;(3) the plants of mainly vegetative propagation.

土壤种子库特征以及与地上植被的关系主要受以下几种植物的影响。1。短命植物；2。仅形成短暂种子库或是大部分时间形成空中种子库或土壤外种子库的植物；3。种子繁殖能力弱而营养繁殖能力很强的植物。

The results showed the seeds of ephemerals mainly distributes in 0～5 cm soil and there are few seeds under the 5 cm soil.The density of the seed banks is different among the different parts of the sand dune.The density decreases gradually from the foot to the top.

结果表明：短命植物种子主要集中分布于地表0～5 cm土壤中，5 cm以下土壤中极少存在有活力的种子；沙丘间及沙丘不同部位的种子库密度大小不同，密度自坡底随高度增加逐渐减少，坡底、坡中部及坡顶部密度分别为124粒/m2、91粒/m2、66粒/m2。

The percentage of total biomass allocated to roots was positively correlated with WUE for the seven investigated species (r=0.93, p.01). Results indicate that the species investigated are typical C3 plants. These spring ephemerals are characterized by higher P T and lower WUE in comparison with other desert species. The unique biomass allocation of low root/aboveground biomass ratio, higher leaf area ratio, higher leaf mass per unit leaf area, and photosynthetic traits are involved in the physiological mechanisms that contributed to the rapid growth of desert spring ephemerals.

这些结果表明，所观测的早春短命植物具有典型的C3植物特征，相比其它类型的荒漠植物具有较高的单位叶面积P高T及低WUE，并且在生长发育过程中表现出很低的根／地上生物量比、较高的叶面积比和单位叶面积干重，说明它们具有相对高的生长速率，这与其生长发育节律相一致，反映了它们与准噶尔荒漠环境相适应的特点。

The main aim of the present study was to address: 1 ） the photosynthetic characteristics and the biomass allocation traits of spring ephemerals and 2） the relationship between these traits and unique growth pattern of these spring ephemerals. Methods In vivo photosynthetic traits of 16 spring ephemerals at their growth stages were measured by an open gas-exchange measurement system （Li-6400） and biomass allocation patterns were measured in seven species.

该文运用Li-6400开放式气体交换光合作用测定系统，对分布于准噶尔荒漠的16种早春短命植物生长盛期的净光合速率、蒸腾速率、水分利用效率等特征进行了测定，并对其中7种植物与生长相关的生物量分配特征进行了分析。

The percentage of total biomass allocated to roots was positively correlated with WUE for the seven investigated species （ r = 0.93, p 〈 0.01）. Results indicate that the species investigated are typical C3 plants. These spring ephemerals are characterized by higher Pn, Tr and lower WUE in comparison with other desert species. The unique biomass allocation of low root/aboveground biomass ratio, higher leaf area ratio, higher leaf mass per unit leaf area, and photosynthetic traits are involved in the physiological mechanisms that contributed to the rapid growth of desert spring ephemerals.

这些结果表明，所观测的早春短命植物具有典型的G植物特征，相比其它类型的荒漠植物具有较高的单位叶面积Pn、高Tr及低WUE，并且在生长发育过程中表现出很低的根／地上生物量比、较高的叶面积比和单位叶面积干重，说明它们具有相对高的生长速率，这与其生长发育节律相一致，反映了它们与准噶尔荒漠环境相适应的特点。

The main aim of the present study was to address: 1 the photosynthetic characteristics and the biomass allocation traits of spring ephemerals and 2 the relationship between these traits and unique growth pattern of these spring ephemerals. Methods in vim photosynthetic traits of 16 spring ephemerals at their growth stages were measured by an open gas-exchange measurement system (Li-6400) and biomass allocation patterns were measured in seven species.

该文运用Li-6400开放式气体交换光合作用测定系统，对分布于准噶尔荒漠的16种早春短命植物生长盛期的净光合速率P(下标 n、蒸腾速率T(下标 r、水分利用效率等特征进行了测定，并对其中7种植物与生长相关的生物量分配特征进行了分析。

As pioneer plants, desert spring ephemerals play an important role in community succession, biodiversity maintenance and dune stabilization in desert ecosystems. We studied the diurnal changes in gas exchange of three desert spring ephemerals (Eremopyrum orientale, Malcolmia scorpioides, and Tetracme quadricormis, hereafter the genus names only) under natural conditions in the desert area of the Dzungaria Basin.

采用LI-6400便携式光合测定仪，在晴天条件下对准噶尔荒漠3种典型短命植物东方旱麦草、卷果涩芥和四齿芥的气体交换特征的日变化规律进行了研究。

Fade far away, dissolve, and quite forget What thou among the leaves hast never known, The weariness, the fever, and the fret Here, where men sit and hear each other groan; Where palsy shakes a few, sad, last grey hairs, Where youth grows pale, and spectre-thin, and dies; Where but to think is to be full of sorrow And leaden-eyed despairs; Where Beauty cannot keep her lustrous eyes, Or new Love pine at them beyond tomorrow.

痛苦的哀嚎相继不停；那里瘫痪凄惨地摇动稀疏的白发，苍白的青年骨瘦如柴，了结残生；迟钝的眼光现露绝望，思索带来烦恼，忧伤陪伴聪明；美女的明眸光辉难以为继，爱情恋意须臾夭折短命。别了！别了！我要向你飞去，乘着诗歌透明的翅膀飞升，不用酒神的车辇和随从相送，我纷乱的头脑和你如影随形！

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。