species point

By the the history of Wildlife Tourism, the concept of modern Wildlife Tourism, and the situation of wildlife park development in China, from the point of the wildlife species conversation and the existence appearance, try to advanced the criterion of Safari Park ranking system.

通过对野生动物观赏的历史沿革，现代野生动物旅游业理念，我国野生动物园的发展现状的论述，从野生动物物种保护和生存状态角度，尝试提出野生动物园等级划分的标准。

Continue to point species, species of happiness has always been difficult getting back.

继续点种, 种的快乐却始终难以找回了.

More to the point, though, is that as Polarstern pursued its mission during the summers of2002 and2005, the rate at which new isopod species were discovered did not decline.

更能说明问题的是，尽管极地号是在2002年夏天到2005年夏天这段时间执行的任务，但发现新等足类动物的速率在这之后并没有下降。

Technical improvements in somatic cell hybridization, such as genetic transformation, provide a promising approach for breeding new tolerant cultivars of this species, good protoplast culture system is fundamental and restriction point.

植物体细胞杂交技术的产生和发展为草地早熟禾新品种选育提供了一条新途径，良好的原生质体培养体系是利用体细胞杂交技术进行品种改良的根本和制约点。

Description of Root Locus of Second Species Third Order System with Zero Point

有零点的二型三阶系统根轨迹的绘制

The influence of foreign plant species on the ecology environment in the region of highway and side environment was analyzed from the point of ecology, and the protection measures were afforded.

从生态学角度分析了外来物种对路域生态环境及其周边生态环境的影响，并提出防范措施。