鳍

Scientists in the U.S. and Switzerlandwere studying the cichlids that live in African lakes.

美国和瑞士的科学家钻研了非洲湖泊中的棘鳍类热带淡水鱼。

According to analyzing the feeding habit of Culter erythropterus in 2006, Cyanobacteria getting up to 91% was the staple of the original carnivorous Culter erythropterus diet, and we presume that feeding habits of fish will change with water quality in different regions.

原为肉食性的红鳍鮊，由2006年的食性分析结果，摄食蓝绿藻的比例高达91%，推测鱼类食性在不同水域可能随水质环境而有所改变。

The result of this study shows that percentage of catching weight from the original dominant species of larger cyprinids, Sinibrama macrops, Carassius cuvieri six years ago, were lower than that prior to 2000 obviously and Culter erythropterus and Oreochromis sp. have replaced Carassius cuvieri to become the new dominant species in Feitsui Reservoir.

研究结果显示，六年前仍存在的中大型优势鱼种高身鲫及黑鲢的捕获重量百分已明显降低，而红鳍鮊与杂交吴郭鱼有取代高身鲫成为水库内优势鱼种的趋势。

The Ag-NORs of 7 species in Abramidinae,namely Culter erythropterus,Erythroculter dabryi,E.ilishaeformis,E.mongolicus,Hemiculter leucisclus,Megalobrama amblycephala and Parabramis pekinensis were studied.

本文研究了红鳍鲅、青稍红鲅、蒙古红鲅、翘嘴红鲅、CAN条、团头鲂和长春鳊等7种鲅亚科鱼类的银染带。

The results indicate that the cyprinids form a monophyletic group while the non-cyprinid cypriniforms form another one,which is in accordance with the hypothesis proposed by Siebert.

鲤科鱼类包含3个主要的分支，即鱼丹系、鲤系和雅罗鱼系；但在非鲤科鲤形目鱼类中，其关系不能得到很好的解决，其中鳅科是复系，平鳍鳅科、条鳅亚科和花鳅亚科可能有较近的亲缘关系。

There are three parts included. The first part is the prepositive-amplifier, it gets broadband high gain and flat frequency response. The second part is the U band quadrupler, which composed of two doublers using a PHEMT chip HMMC-5040, a Schottky diode of DMK-2790, a HMMC-5040 amplifier, and a fin-line transitional stage. Maximum output power higher than 60mW is obtained in V band. The third part is a 2nd harmonic gunn oscillator injection locked by the Fundamental Wave,which get about 2GHz locked bandwidth in W band.

电路主要由三部分组成，第一部分为采用HMMC-5618设计的前置放大器，实现了宽带高增益和平坦的频率响应；第二部分为设计的主体，由HMMC-5040设计的二倍频器、DMK-2790设计的二倍频器、HMMC-5040设计的放大器及鳍线过渡段组成的U波段四倍频器，在U波段实现了最高60mW以上的输出功率；第三部分为基波注入锁定谐波Gunn振荡器，在W波段实现了近2GHz锁定带宽。

Flippers may indeed be a necessary response to aquatic life;turtles, whales, and dugongs also have them. But the common detailed design found among the pinnipeds probably indicates a common ancestor.

有让步就有转折，下一句的转折暗示新观点的出现：但在鳍足亚目动物之间所发现的那种普遍的细致构造可能表明它们来自共同的祖先。

A low viscosity oil designed for punching pre-coated aluminium sheet, copper tube expansion and bend ing.

适合于空调行业中预涂铝鳍片的冲孔加工，也适合于铜管的弯管和胀管加工。

A low viscosity oil designed for punching pre-coated aluminium sheet, copper tube expansion and bend ing.

低粘度金属加工油，适合于空调行业中预涂铝鳍片的冲孔加工，也适合于铜管的弯管和胀管加工。

The fins, fairings and other small parts are laid out over a drawing the size of the hull mold box.

该鳍， fairings和其他小部分是奠定了超过图纸的大小船体模框。

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。