榆树

Effect of returning hill terraced fields for farming to forestry and grass were surveyed based on fixed point observation for nine years continuously. The results showed that death rate of Popular cathayana, Ulmus pumila and Hippophae rhamnoides was 100%, 92% and 12.7% respectively in terraced fields.

通过对湟源地区阴坡梯田退耕还林还草工程连续9年样区定点观测，结果表明，在梯田栽植的杨树到第9年100%死亡，榆树的成活率只有8%，沙棘的成活率为87.3%，柠条的成活率达100%，但长势不旺。

The results indicated that the growth of 3-year-old Prunus salicina was significantly higher than that of the other species, such as 139.1% and 153.7% higher than Toona sinensis and Juglans regia in height growth, respectively. The maximum percentage of DBH more than 1.0 cm was 91.9% for P. salicina. Next were 49.5% and 48.8% for Ulmus pumila and Pteroceltis tatarinowii, respectively. The contents of total N, total P and total K ranged from 1.36% to 2.52% in the leaves of testing species. The highest content of total N and total P was found in the leaves of Catalpa bungei, while the highest content of total K was observed in P. saltcina leaves. The results indicated that P. salicina, P. tatarinowii, U. pumila had well adaptability on the Karst area both in the growth status and the improvement to the soil with the fallen leaf.

结果表明：(1)3年生冰脆李的生长量明显优于其他树种，其高生长比香椿、核桃分别大139.1%和153.7%；植株胸径大于等于1.0 cm株数的百分比以冰脆李最高达到91.9%，其次是榆树和青檀，分别是49.5%和48.8%；(2)8个树种落叶的全N、全P和全K的总含量变动为1.36%~2.52%，其中全N、全P含量以滇楸最高，全K含量以冰脆李最大；(3)从各树种落叶前后各元素含量及其转移情况看，冰脆李、青檀表现出对大部分营养元素具有较高的循环利用养分或保持养分的能力，而香椿及刺槐相对较弱。

On the second level, the unfixable conflict between man and man is investigated through Desire Under the Elms and Long Days Journey into Night.

第二个层面以人与人的冲突为主要矛盾，分析《榆树下的欲望》和《长日入夜行》。

Under the huge elm trees, we could see yellow dandelions popping through the grass in bunches, as if a painter had touched our landscape with dabs of gold .

在一些高大的榆树下面，我们可以看到，一丛丛黄色的蒲公英冒出草坪，仿佛是一位画家为了给眼前的美景增色而着意加上的点点金色。

They have lopped away the biggest of the branches of that elm the road .

他们把那棵榆树低垂在公路上的最大的枝子砍掉了。

The villagers have lopped away the biggest of the branches of that elm the road .

村民们把那棵榆树低垂在公路的最大的枝子砍掉了。

Not even a bird, only a promise, a slash of wings caught peripherally fifty feet away, elm to ash, a purpled shadow in the noon lake.

甚至不是只鸟，只是个许诺，眼梢捕捉到的一个翼痕五十尺外，榆树到梣树，月湖里的一个紫色影子。

By noon the sun came out as clear and sultry as if there had never been a cloud, the northeast wind died away, the bay was motionless, the first locust of the summer shrilled from the elms, and the robins seemed to be serving up butterflies hot for their insatiable second brood, while nothing seemed desirable for a human luncheon except ice-cream and fans.

到中午时分，太阳出来了清晰和闷热，好像从来没有云，东北风力消失，海湾是一动不动，从今年夏天的榆树尖声第一蝗虫和知更鸟好像是煮好的蝴蝶他们永不满足的第二热窝，而没有什么似乎是一个除了冰淇淋和风扇人类午餐可取的。

Already trees are dying in frightening numbers. The elms and chestnuts are long gone, the stately hemlocks and flowery dogwoods are going, and the red spruces, Fraser firs, mountain ashes, and sugar maples may be about to follow.

那时现有树木将以惊人的数量死亡，榆树和栗子早已绝迹，雄伟的铁杉以及鲜花点缀的山茱萸消失殆尽，而红杉，冷杉，山地花楸以及糖枫也将随之而去。

The bed is available in ash, beech, cherry, elm, maple, oak or walnut woods.

这张床均可使用灰分、榉树木、樱桃木、榆树木、枫树木、橡树木或胡桃木制成。

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。