树种

The trees planted here are seedless, which actually makes the situation worse; the blowballs are lighter and can be blown farther.

北京种植的毛白杨树种没有籽，因而杨絮更轻，飘得更远。

Results showed that the topsoil (10cm) pH increased with increasing distance from bole. The minimum topsoil pH presented on the region of bole base. Some contour lines of topsoil pH were concentric circles which centered in boles.

结果表明，两树种树干周围表层土壤(10cm)的pH均由树干基部向外围逐渐增加，pH最低值常出现在树干基部附近，有的树干周围土壤pH等值线呈近似同心圆的分布。

The biodiversity of bryophytes as correlated with forest vegetation, tree component, and microenvironment in the forests.

地面生和树附生苔藓植物多样性与林型、树种及其所形成的林内微环境相关。

The object list is bright:( 1 ) Breakingfruit Chinkapin fibre's pH is lower , and it haw big Buffer capacity;( 2 ) Breakingfruit Chinkapin fibre has good permeability, When making MDF our should suitably enlarge Resin content;( 3 ) Along with compound than reducing of (Breakingfruit Chinkapin fiber / other wood fiber ), internal bond strength modulus of rupture, modulus of elasticity has trend that at first down than upward.

结果表明：（1）黎蒴栲材热磨纤维的pH值低，缓冲容量大；（2）黎蒴栲材纤维的渗透性良好，制造MDF时应适当加大施胶量；（3）随着复合比（黎蒴栲纤维/其他树种纤维）的减少，MDF的内结合强度、静曲强度、静曲弹性模量成先下降后上升的趋势。

The paper takes Breakingfruit Chinkapin fibre and other wood fiber compound manufacturing MDF's Processing-parameter for research object. Use the diagonal intersection trial law designing the trial scheme. The focal point is studied the major Processing-parameter of Breakingfruit Chinkapin with other woods to manufacture MDF. And internal bond strength, modulus of rupture, modulus of elasticity, formaldehyde emission content, thickness expansion rate of water absorbing and density of MDF are analysed. From Variance, Range and other methods seek the better Processing-parameter.

本文以黎蒴栲材热磨纤维与其他树种热磨纤维复合制造MDF工艺为研究对象，采用正交试验法设计试验方案，并根据国家标准规定的测试方法对压制成的MDF的内结合强度、静曲强度、静曲弹性模量、甲醛释放量、吸水厚度膨胀率等多项性能进行分析，利用方差、极差等分析手段寻找合理的制造工艺参数。

Grassy meadows, winding lakes, copses of trees, shelter belts, native tree species, roads that are "never straight," and a no hedges/no fences rule are all early English garden design components.

草山草甸，蜿蜒的湖泊，copses树木，防护林带，原生树种，公路，是&没有了&，并没有篱笆/没有围栏的规则都是早期的英国园林设计组件。

But farmers can also grow criollo or trinitario cacao plants. Cacao trees grown on farms are much more easily threatened by disease and insects than wild trees are.

但，农民也种植 criollo 可可树和 trinitario 可可树，可可树种在农场要比野生的可可树更容易受到疾病和昆虫的威胁。

We cultivate and harvest a variety of species including Eucalypts, Chinese fir, pine and others, ensuring plentiful and stable supply of wood fibre for our manufacturing facilities.

嘉汉板业种植及经营的各类树种包括桉树、杉树、松树等，为其生产基地提供充足及稳定的木材原料。

The spatial pattern of the small-sized stems is similar to that of the standing die stems. The distribution of the big-sized stems is relevant to that of fall-down stems. The snapped stems are mainly composed of the shadow tolerant species understory, seldom the typical shadow intolerant species.

小径级的断头木分布格局接近于枯立木，较大径级的断头木则多与倒伏木的分布相关，断头木中少有典型的阳性树种，主要由林下荫耐种构成。

The fall-down stems chiefly distribute at the middle of slope and both side of the ridge. Their appearing frequency is in positive ratio to slope; The ones at middle of the slope are mainly shadow-intolerant tree species of small size, those at the side slope of ridge are mostly the big-sized dominant species in the community.

倒伏木主要分布在海拔1200～1800m之间坡面中部和顶脊两侧，发生频率与坡度成正比；坡地中部以中、小径级阳性树种为主，山坡顶脊两侧的倒伏木则多为大径级的群落优势种。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐