查询词典 extinction

Ecotourism — sustainable travel that is built around observing wild animals, not disturbing them — provides vital revenue for many local communities in wildlife-rich areas. And a steady stream of tourists can help convince people in biological hotspots like Madagascar or the Brazilian Pantanal that the local wildlife is worth more alive than extinct. For visitors, the prize is a firsthand study of the extinction crisis: you can't really understand what the world is at risk of losing, until you've come eye-to-eye with an indri lemur or a ploughshare tortoise.

生态旅游--可持续发展旅游，比如观看野生动物，但不打扰他们--为野生动物集中地区提供保护资金，固定的旅游团体的观光也会帮助当地居民比如马达加斯加和巴西潘纳尔更确信保护野生资源的观念，对于游客来说最大的收获就是亲眼目睹了濒临灭绝的危机，只有你亲眼看到一只大狐猴或一只乌龟的照片你才知道世界面临着每时每刻都在消失一些物种的危机。

The maximum absorption peak was at long wavelength (＞650nm), extinction coefficient achieves 10〓 degree, which was one degree higher than HpD. The study has revealed that CPD photosensitizer appeared blue movement under the relevant body environment. The spectra parameters provided basis for selecting light source of PDT. Measurement system which measured singlet oxygen and its quantum yields within the infare range had been set up and the quantum yields of singlet oxygen for CPD were reported: the quantum yields of singlet oxygen for CPD〓 was the highest (φ=0.83) while he quantum yields of singlet oxygen for CPD〓 was the lowest (φ=0.83). Photobleaching's half life time was studied.

给出了此类光敏剂的光谱指认和光谱参数：其吸收光谱峰值位于长波红光区(＞650nm)，摩尔消光系数达10〓LmoL〓cm〓量级，比血卟啉衍生物高出一个数量级；研究揭示了此类光敏剂在近似体内环境下光吸收的蓝移现象，为光动力治疗光源的选择提供了依据；建立了在近红外光谱区中测定敏化单态氧的光谱和量子产率测量系统，报导了该类光敏剂敏化单态氧的量子产率，其中CPD〓的单态氧量子产率最高(φ＝0.83)，CPD〓的单态氧量子产率最低(φ＝0.51)；测定了二氢卟吩类光敏剂的光漂白半衰期。

Some conditions for weakly Persistence and extinction are obtained;In the second part, we respectively use C_h space and C_g space theorem to study the existence of periodic solutions of Lotka-Volterra equation with infinite delay, in the end we get the condition of the existense of periodic solutions and estimate the interzone of it.

第二部分利用相空间理论，分别以C_h空间和C_g空间为相空间研究了具有无限时滞的Lotka-Volterra方程周期解的存在性问题，给出了周期解存在的充分条件，并估计出了周期解的存在区间。

The concentration of iridium in this way can be found in meteorites, the scientists put it linked to the extinction of dinosaurs.

这样浓度的铱在陨石中可以找到，因此，科学家们就把它与恐龙灭绝联系起来了。

It is an inviolable natural law that extinction is an irreversible step in the evolutionary process.

物种灭绝是进化过程中不可逆转的步骤，这是不可违背的自然法则。

The scientists then added a jolting statement:"At present, there is a vacuum of information, and elasmobranches can easily drop to extinction without notice."

然后，科学家将一个颠簸声明："目前，有一个信息真空，elasmobranches可以很容易下降到灭绝，恕不另行通知。"

Wildlife Tuesday, April 1, 2008Five endangered New Zealand Kakapo parrots hatch; 91 now surviveWELLINGTON, AP — The world's largest species of flightless parrot is edging back from extinction with five new chicks hatched in New Zealand in recent weeks and two more on the way, wildlife officials said Monday.

威灵顿，美联社—纽西兰野生动物保育人员周一表示，全世界最大但无飞行能力的鹦鹉，在最近几周内已孵出五只小鹦鹉，而且尚有两只即将诞生，使该种类鹦鹉稍远离濒危边缘。

To keep sb/sth alive, or safe from harm or danger 使继续存活;保护;保全 VN ~ sb/sth The society was set up to preserve endangered species from extinction.

成立这个协会是为了保护濒危物种不致灭绝。 reserve有主动去防止，去保存，去储备的意思 conserve有抵御外界损害力量的意思，环形抵御，全方位因为构词成分是con－ preserve也是被动的保有某种状态，侧重于状态的无变化

One species – the Kemp's Ridley sea turtle, is still very much in danger of extinction.

有一个物种–大西洋丽龟，仍然处于濒临灭绝的危险中。

Almost 50 years later, scientists are still astonished at the leatherback's physical prowess, though today wonder is alloyed with a more modern sentiment: fear that even before we fully understand the leatherback and its epic life story, our own activities may be driving it to extinction.

近50年后，革龟的非凡体力依旧令科学家惊讶，不过今天的惊讶中又多了几分现时的感伤：担忧在完全了解革龟和牠长远的身世背景之前，我们自己的所作所为就已经造成牠们灭绝了。

In this new architectural plan the Garden of Golgotha came to be at the centre of the new city.

Aelia 是高举他自己，并在此城内朝拜罗马诸神。

The continuous nature of peat accumulation means that terrestrial coaly rocks may provide a higher resolution and more complete record of base-level change than the time-equivalent shallow-marine strata, thus enabling the identification of highfrequency cycles that are not recorded in themarine strata.

泥炭积累的持续性质的手段，陆地coaly岩石可提供较高的分辨率和更完整的记录基准面变化的影响时，相当于浅海阶层，从而使确定的高频周期，不记录在themarine 阶层。