鳍

Coaxial, contrarotating and widely separated semi-rigid three-blade rotors, with swept blade tip, attached to hub by steel plates; small fuselage cross-section, with nose sensors; flat-screen cockpit, heavily armour protected by combined steel/aluminium armour and spaced aluminium plates, with rearview mirror above windscreen; small sweptback tailfin, with inset rudder and large tab; high-set tailplane on rear fuselage, with endplate auxiliary fins; retractable landing gear; mid-set unswept wings, carrying ECM pods at tips; four underwing weapon pylons; engines above wingroots; high agility for fast, low-flying, close-range attack role; partially dismantled can be air-ferried in Il-76 freighter.

同轴，并广泛分离的反向半刚性三叶片转子，叶片尖后掠，隶属由钢板枢纽；小机身的横截面，有鼻子传感器；纯平驾驶舱，重装甲保护的组合钢/铝装甲铝及间隔板，前挡风玻璃与后视镜以上；小sweptback尾翼，方向舵与插图和大型标签；高载列于机身后部尾翼，与终板辅助鳍，可伸缩的起落架，中集未波及翅膀，承载的秘诀流脑豆荚；四翼武器挂架； wingroots发动机以上；快速高敏捷性，低空飞行，近距离攻击的作用；部分拆除，可空气中摆渡伊尔76货机。

It is an important test platform supporting the study of underwater vehicle based on undulatory propulsion of long flexible Fin.

是支撑柔性长鳍波动推进水下机器人研究的重要试验平台。

With the test model of underwater vehicle based on undulatory propulsion of long flexible fin as background, the paper mainly studied how to construct the test system which can satisfy the static and dynamic hydrodynamic force and moment measurement requirements of diversified test models of underwater vehicle fixed at arbitrary attitude.

以基于仿生柔性长鳍波动推进的水下机器人试验模型为背景，主要研究如何构建满足多种水下机器人试验模型在各种姿态下流体动力／力矩的静态与动态测量要求的测试系统。

Of the shark-kind some have no fins, such as those that are flat and long-tailed, as the ray and the sting-ray, but these fishes swim actually by the undulatory motion of their flat bodies; the fishing frog, however, has fins, and so likewise have all such fishes as have not their flat surfaces thinned off to a sharp edge.

一些鲨鱼类动物没有鳍，就像貂鱼和黄貂鱼一样，但是这些鱼实际上是靠扁平身体的波动来移动；然而鱼蛙有脚，就像所有没有平滑身体削薄到尖锐边缘的鱼类一样。

Unpaired median fin on the backs of fishes and some other aquatic vertebrates that help to maintain balance.

鱼类和其他水生脊椎动物背部帮助保持平衡的奇鳍。

At 80 W, the thermal resistance is 0.11 K/W for the porous surface. For the same condition, the thermal resistance is 0.22 and 0.33 K/W for pin-fin and mesh-covered surfaces, respectively.

以池温50oC之FC-72而言，在80 W时：针状鳍片与网格表面之阻抗分别为0.22及0.33 K/W；多孔隙表面之热阻约0.11 K/W，比光滑表面降低约80 %。

Thus it appears that porgy was more sensitive to the WAF than scorpionfish at the low dose, but less tolerant at the high dose.

所以对于0#柴油认叭F而言，黄鳍绸比褐葛鳅更为敏感，但对诱导物的耐受性较低，EROD活性诱导范围较狭窄。

It reached maximal activity (up to 13.30-fold) at the concentration of 75g/L, followed by an apparent reduction when the concentration of the WAF increased to l00g/L.

一摘要一5。在10林留L一100林岁LO#柴油场叭F的诱导下，黄鳍绸肝脏EROD活性随诱导物浓度的提高呈迅速上升趋势，于75林创L剂量组到达峰值，是对照组的13.30倍。

In comparison, each induced group of hepatic EROD activity from porgy increased in a higher degree than that from scorpionfish at the same dose of the WAF, and was suppressed at l00g/L in porgy but not in scorpionfish.

与褐葛鳅比较，几乎在每个诱导组黄鳍酮肝脏EROD活性的提高幅度都比较大，而且在100林留L 剂量组就已经出现抑制现象。

Since a beaver spends much of his time in the water, a paddle tail and webbed feet are extremely useful

由于河狸在水中呆，的时间很多，因而鳍状的尾巴及有蹼的脚就非常有用。

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。