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But on account of excessive cut since 1949, forest resources cutdown sharply, bring a series of problem, for instance, forest productivity decrease, forest habitat fragmentation, agrestic species become extinct at a high speed, environmental quality decline, this paper discussed forest resources change in Heilongjing Province from statistical change feature of forest resources and forest landscape pattern change, using model of GM(1,1) to predict the development trend of forest resources here.

但由于半个多世纪的过量采伐，致使森林资源锐减，带来了森林生产力下降、森林生境破碎化、乡土物种加速灭绝和环境质量下降等一系列问题。本文从森林资源统计变化特征、森林景观格局变化两个方面对黑龙江省森林资源的变化进行了研究，并用灰色理论的GM(1，1)模型对该省森林资源未来的发展进行了预测。

In former classifications a division of Amphibia comprising all pre-Jurassic and some later extinct large salamandriform amphibia .

在旧的分类中是两栖纲的一个部，包含所有侏罗纪以前和一些后来灭绝的大型蝾螈形两栖动物。

The Ampyx is an ancient beast, now long-extinct. A docile, water-dwelling omnivore, it cruised along the sandy coastline, scavanging plankton, algae, and detritus.

Ampyx是一种早已灭绝的上古动物，性情温顺，水居杂食，时常巡游于海岸边，以浮游生物，藻类和微生物腐质为食。

Or certain extinct forms related ancestrally to the modern horse.

马科动物马科的动物，例如野生亚洲种蒙古野马或者是某些与现代马有祖先关系的已灭绝的马种

Any of various equine mammals ,such as the wild Asian species E.przewalskii or certain extinct forms related ancestrally to the modern horse.

马科动物马科的动物，例如野生亚洲种蒙古野马或者是某些与现代马有祖先关系的已灭绝的马种

Przewalskii or certain extinct forms related ancestrally to the modern horse.

马科动物马科的动物，例如野生亚洲种蒙古野马或者是某些与现代马有祖先关系的已灭绝的马种

A small, herbivorous, extinct mammal of the genus Hyracotherium from the Eocene Epoch of the western United States, having four-toed front feet and three-toed hind feet and related ancestrally to the horse.

始祖马始新世产于美国西部的一种属于蹄兔属的哺乳动物，已灭绝，体型小，食草，前蹄四趾，后蹄三趾，为马的远祖

The main principle of the DCcontactor:The electromagnetism coil switches on electricity thetitle iron to match with the iron heart on,the suction of theelectromagnetism system overcomes the counterforce of the springarouses the action of the contact, the main electric circuitconnected;The electromagnetism coil cuts the power the counterforceof the spring arouses the title iron from move to open, the headcontact breaks to open the output electricity arc give or get anelectric shock in drive to arc-extinct-chamber and made longer,thestrong cooling dissociates and put out,the main electric circuitcuts off.

接触器的主要原理：电磁线圈通电，衔铁和铁心吸合，电磁系统的吸力克服弹簧的反作用力带动动触头与静触头接触，主电路接通；电磁线圈断电，弹簧的反作用力带动衔铁和动触头弹开，触头断开产生的电弧在灭弧室中受到磁吹灭弧和电动力驱动被拉长，并强烈冷却去游离而熄灭，主电路切断。

The Red Rail or Red Hen of Mauritius, Aphanapteryx bonasia, is an extinct rail.

再有一种动物在世上绝迹，证明人类的破坏力何其强大。

Wadi Al-Hitan, Whale Valley, in the Western Desert of Egypt, contains invaluable fossil remains of the earliest, and now extinct, suborder of whales, the archaeoceti.

位于埃及沙漠西部的干涸河道的鲸谷，包含着早期残留的现已灭绝的珍贵人类所知道的最后一批有腿的鲸化石。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。