Pearling, now, is mostly done by freshwater farmers.

STUDY ON AQUATIC EXPERIMENTAL ANIMALS AND THEIR UTILIZATION Susceptibility Test of Small Freshwater Fishes to Toxicants.

黑青小蜂(金小蜂)Dibrachyscavus(Walker) 生物学特性及其应用的研究.

The perch is a freshwater fish.

鲈鱼是淡水鱼。

Products: Eels and other freshwater fish farming Eels and other freshwater fish farming.

经营范围: 鳗鱼及其他淡水鱼养殖.

There are bright prospects for freshwater fish farming.

淡水养鱼大有可为.

European freshwater fish having a flattened body and silvery scales; of little value as food.

有扁平身体和闪光鳞片的欧洲淡水鱼; 没什么食用价值.

Domoic acid has been found in some marine shellfish and not in seawater or freshwater.

部分海洋贝壳动物体内检出软骨藻酸;海水及地面淡水中未检出软骨藻酸.

Lampetra japonica could migrate to the Yellow Sea region and freshwater in Jiangsu Province.

日本七鳃鳗可以迁移到黄海及江苏省淡水中.

Used for breeding of shrimp and shrimp , be acceptable widely for propagate and breed shrimp freshwater.

用于虾苗培育和成虾养殖,广泛适用于海水、水虾类、类、类繁殖、殖生产.

Freshwater shells, shell carving, Fuwa. Welcome to order!

淡水贝壳, 贝雕, 福娃. 欢迎订货!

The monitoring system for freshwater line plays an important role in preventing the flood.

内河水位监控在防洪救灾方面发挥着巨大的作用.

Many freshwater fishes become sluggish in winter.

许多淡水鱼到了冬季就不活跃了.

Uesed in freshwater, salt water, sea water, sewage and chemical pump matching.

淡水 、 咸水 、 海水 、 污水中及化工泵配套使用.

Japanese Freshwater Crab lives in mountain stream.

日本淡水渓蟹栖息在山溪中.

Since then, the Fresnel lives of the new content.

从此, 聂耳的生活注入了新的内容.

The difficulty was resolved by Fresnel with his addition of the concept of interference.

菲涅耳通过加进来干涉概念,解决了这个困难.

The result indicates that fractional Fourier transform is the proper mathematic tools to Fresnel diffraction.

结果表明:分数傅里叶变换是适应于菲涅耳衍射的数学工具.

The limitation of far region Fresnel-Kirchhoff formula in transient problem is dis-eussed.

本文讨论了应用频域远区近似夫累涅尔-基尔霍夫公式计算瞬态辐射场的局限性.

The Fresnel diffraction formula and the Fourier transforms are used to get the intensity distribution formula.

采用菲涅耳衍射公式和傅里叶变换得出了输出面上的光场的理想计算公式.

The number of spectral switch increases with increasing Fresnel number and truncation parameter, but.

数值计算结果表明,光谱开关主要与截断参量 、 光束菲涅耳数以及光谱相干度有关.

Augustin Fresnel " , " Nature is not embarrassed by difficulties of analysis. ", "

大自然 并不被分析的困难所阻碍.