狐尾

The Chinese grass carp is one. It eats large amounts of water milfoil and other weed s that grow under the water surface.

中国草鱼即是一例，它能吃掉大量狐尾草之类的长在水面下的杂草。

The results show that: Rhizome of Oldworld Arrowhead., water lettuce, and Brazilian milfoil. have a normal growth in eutrophicated water, and they also have a certain degree of purification capacity.

结果表明：慈姑、大薸、穗状狐尾藻在供试富营养化水体中均能正常生长，对富营养化水体均有一定的净化能力。

Grown alone, Rhizome of Oldworld Arrowhead , water lettuce, and Brazilian milfoil, have a DO increase rates of 62.5%, 50% and 50% in water respectively; Besides the total removal efficiency of BOD are 93.26%, 90.27% and 92.38%; What's more ,the total COD removal efficiency are 76.02%,, 71.58% and 79.76%. respectively.

单独种植的慈姑、大薸、穗状狐尾藻供试水体中DO的升高率分别为62.5%、50%和50%；对BOD的总去除率分别为93.26%、90.27%和92.38%；对COD的总去除率分别为76.02%、71.58%和79.76%。

Using three different types of living aquatic plants Rhizome of Oldworld Arrowhead, water lettuce, and Brazilian milfoil as test materials,we study a single planting of that three aquatic plants' impact on eutrophicated water DO, BOD, COD.

中文摘要：选择三种不同生活型水生植物慈姑（Sagittaria sagittifolia 、大薸、穗状狐尾藻为试验材料，研究了单一种植这三种水生植物对富营养化水体中的DO、BOD5、COD的影响。

Hydrophytes with floating leaves can exchange gases with the atmosphere; many submerged hydrophytes, such as spiked water milfoil have no stomata, absorbing water and gases over their entire surface.

而很多沉水植物，如狐尾藻没有气孔，通过整个植株的表面吸收水分和气体。

Different submerged plant communities had indicative significances for the wetland hydro-environment. For example, the occurrence of Myriophyllum spicatum + Potamongeton crispus community was an indicator for severe eutrophication, while that of Batrachium pekinens community could he regarded as an indicator of better water quality.

不同沉水植物群落分类组对环境因子有明显的指示意义，狐尾藻＋菹草群落是水体严重富营养化的表现，而北京水毛茛群落的出现是水质较好的表现。

One of the oldest living trees is a bristlecone pine,thought to be about 4900 years old.

现存的最古老的是狐尾松，估计大约已经有4900多岁。

Some bristlecone pine trees in the American West are more than 4000 years old, seedlings at the time the Egyptians were building the Pyramids.

而生长在美国西部的一些狐尾松已经4000多岁了。其秧苗初长之时，埃及人正在修建金字塔呢。

Higher up in the nearby mountains, bristlecone pines.

附近的高山上，狐尾松

In 1957, a scientist named Edmund Schulman discovered the oldest living organism in earth's history - the Bristlecone pine.

1957年，一位名为埃德蒙·舒尔曼的科学家发现了这位地球生物史上的最长寿老寿星-狐尾松。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。