The gills constitutes of gill arch, gill raker, gill filament, branch leaf.

Histopathological lesions are mainly hyperplasia and hypertrophy of the gill epithelium.

组织病理损伤主要是鱼鳃上皮细胞的增生和肥大。

Copper Speciation in the Gill Microenvironment of Cyprinus carpio

铜在鲤鱼（Cyprinus Carpio）鱼鳃微环境中的形态分布

Accumulation of copper is decreased in the gill with Pb or metal mixture of Pb& Cd.

Pb、Cu和Cd的混合物能够减少Cu在鱼鳃中的积累。

Antioxidative Activity of Green Tea Extracts by using the Fish-Gill Lipoxygenase as the Model

绿茶萃取液的抗氧化性&以鱼鳃脂氧合酶为模式的探讨

Methods Meat, gills and scales samples were collected from the freshwater fishes, digested by artificial stomach liquid and examined for the encysted metacercaria of Clonorchis sinensis under microscope.

方法取淡水鱼肉、鱼鳃及鱼鳞，采用人工胃液消化法，镜下检查华支睾吸虫囊蚴。

Fractionation of Pyrene on Fish Gill Surface

用连续提取法研究芘在鱼鳃表面的结合形态

She never failed to return my smile, my grasp, and my sin chau greeting.

她也会对我的微笑、握手及问候报以同样的微笑、握手及问候。

Will be built in rather large scale since 2007, so the times of supply the basic varieties of these products depending on import will go never to return.

2007年PAN基碳纤维、对位芳酰胺纤维、连续玄武岩纤维及聚苯硫醚等纤维将开始兴建较大规模生产厂，这些产品的基本品种依赖进口的时代即将过去。

That is to say, we must never attack others without provocation, but once attacked we must never fail to return the blow.

这就是说，决不可无故进攻人家，也决不可在被人家攻击时不予还击。

Why is it that some people never remember to return money?

为什么有些人总是会忘了还钱啊？

Soccer superstar Steve McManaman laps up the millionaire lifestyle on his ￡ 500,000 motor cruiser-after vowing never to return to English football.

发誓永远不会回到英国足坛的足球超级明星史蒂夫·麦克马拉曼开着他价值50万英镑的摩托游艇，过上了百万富翁式的好日子。

Although life and business have many lessons to teach us, Dr. Cloud observed 10 "doorways" of learning that high performers go through, never to return again.

虽然生活和工作带给我们的教训有很多，但是克劳德教授为我们总结出了成功人士经历并吸取的10个教训。

Some even thought that with students able to load class materials and textbooks easily on to the 10-ounce device, the era of lugging textbooks around campus might finally be over.

有人甚至以为，当学生能够将课堂资料和课本存放在重约10盎司的电子设备上，在校园里背着沉重的课本奔走的时代或许会一去不返。

Therefore, each hour of this day will I cherish for it can never return.

因此，我会珍惜今天的每一个小时，因为它将一去不返。

Come here and record things and person with your own hand, commemorating the memory that's gone for ever.

来把旅途中的各种人和事亲手记录下来吧，纪念某人，纪念某一段一去不返的美好回忆。

Those were extremely difficult times but those days are now behind them.

那是非常艰难的时间，但是那些日子已经一去不返了。

But all the occurrence once led of everything all along with time of passage but a don't return.

而所有曾经发生过的一切都随着时间的流逝而一去不返。

But once passed, it is gone forever.

而时间一旦度过，便永远地一去不返。

Even if the world can find more oil-in the Arctic or tar sands, say-the longer-term question is whether the era of "cheap energy" is over and how the world can adjust if it is.

即便世界各国能够找到更多石油（比如在北极或焦油砂中），更长远的问题是：“廉价能源时代”是否已一去不返？若是，那各国又能如何应对？

Careers are not ladders. Those days are long gone

职业并不是梯子那种时代已经一去不返了