森林学

Center for Ecology and Conservation Biology is primarily dedicated to education and research in ecology and conservation biology including paleoceanography, ecological economics, sensory biology, behavioral ecology of birds, behavioral ecology and insect sociobiology, evolutionary biology, ichthyology, forest ecology and biogeochemistry, mammalian population genetics, etc.

生态学与保护生物学中心致力于生态学与保护生物学的教学与研究，其研究领域包括古海洋学，生态经济学，感官生物学，鸟？？？？？行为生态学，行为生态学和昆虫社会生物学，进化生物学，鱼类学，森林生态学和生物地理化学，哺乳动物遗传学等。

Park pass consolidated - Gear Box If you visit a lot of federal parks and forests, as I do, you probably learned of the value of the "Golden Eagle" annual pass for national parks and the little add-on sticker that was good at other pretty places run by the Interior and Agriculture departments....

通过综合园区齿轮箱如果您访问了许多美国联邦森林公园，像我一样，你可能学的价值&黄金之鹰&每年为国家公园和小通加贴纸，善于经营的其它地方漂亮内政部和农业部门

urban forest ; selection of tree species ; planting trees on the sites best suited ; priority of ecological benefits ; principles

笔者针对这些问题进行研究，以期能提出有效解决这些问题的原则和方法。1 适地适树原则[1]在森林培育学中，适地适树

Younger brothers and sisters of the war generation, who had been playing with marbles and dolls during the battles of Belleau Wood and Chateau-Thierry, and who had suffered no real disillusionment or sense of loss, now began to imitate the manners of their elders and play with the toys of vulgar rebellion (secondary, low-quality imitation of the rebellion).

在贝洛森林战役和蒂耶里堡战役正在进行之时，参战青年的小弟弟小妹妹们还在家里玩着弹子游戏和洋娃娃，他们并没有体验到真正的幻想破灭或失落感，可现在竞也学起兄长们的样子，玩起群众性的反传统游戏来了。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。