英语语法分析

Hogan and a wels catfish (Silurus glanis) take a swim in Spain's Ebro River, 2009.

2009年，国家地理研究员泽布·霍根和一位捕鱼向导在西班牙的埃布罗河托着一条135磅重、83英寸长的六须巨鲇（学名：Silurus glanis）。

Compared with Silurus meridionalis Chen, whose external appearance was similar to the local catfishs, the local catfish grew slower.

对本地鲶鱼的形态、生活习性、食性等生物学特征进行了观察，并把它与在外形上与其相似的南方鲶进行了比较。

The pathogenic strains were isolated from sick Silurus meridionalis, named N1, N2, N3 and N4. And three Bdellovibrios were isolated from fishpond sullage using N3 as prey.

从患病南方大口鲶分离得到病原菌N1、N2、N3、N4，以N3为宿主菌，从鱼塘淤泥中分离到三株蛭弧菌。