鳘

At night there was never a traveller passed my house, or knocked at my door, more than if I were the first or last man; unless it were in the spring, when at long intervals some came from the village to fish for pouts — they plainly fished much more in the Walden Pond of their own natures, and baited their hooks with darkness — but they soon retreated, usually with light baskets, and left "the world to darkness and to me," and the black kernel of the night was never profaned by any human neighborhood.

从没有一个人在晚上经过我的屋子，或叩我的门，我仿佛是人类中的第一个人或最后一个人，除非在春天里，隔了很长久的时候，有人从村里来钓鳘鱼，——在瓦尔登湖中，很显然他们能钓到的只是他们自己的多种多样的性格，而钩子只能钩到黑夜而已——他们立刻都撤走了，常常是鱼篓很轻地撤退的，又把"世界留给黑夜和我"，而黑夜的核心是从没有被任何人类的邻舍污染过的。

There have been caught in Walden pickerel, one weighing seven pounds —— to say nothing of another which carried off a reel with great velocity, which the fisherman safely set down at eight pounds because he did not see him —— perch and pouts, some of each weighing over two pounds, shiners, chivins or roach, a very few breams, and a couple of eels, one weighing four pounds —— I am thus particular because the weight of a fish is commonly its only title to fame, and these are the only eels I have heard of here;——also, I have a faint recollection of a little fish some five inches long, with silvery sides and a greenish back, somewhat dace-like in its character, which I mention here chiefly to link my facts to fable.

在瓦尔登湖中，捉到过梭鱼，有一条重七磅，且不去说那另外的一条，用非常的速度把一卷钓丝拉走了，渔夫因为没有看到它，估计它稳稳当当有八磅的重量，此外，还捉到过鲈鱼，鳘鱼，有些重两磅，还有银鱼，鳊鱼（学名Leueiscus Pulchellus），极少量的鲤鱼，两条鳗鱼，有一条有四磅重，——我对于鱼的重量写得这样详细，因为它们的价值一般是根据重量来决定的，至于鳗鱼，除了这两条我就没有听说过另外的，——此外，我还隐约记得一条五英寸长的小鱼，两侧是银色的，背脊却呈青色，性质上近于鲦鱼，我提起这条鱼，主要是为了把事实和寓言连接起来。

The shiners, pouts, and perch also, and indeed all the fishes which inhabit this pond, are much cleaner, handsomer, and firmer-fleshed than those in the river and most other ponds, as the water is purer, and they can easily be distinguished from them.

银鱼、鳘鱼，还有鲈鱼，所有在这个湖中的水族，确实都比一般的河流和多数的别的湖沼中的鱼类，来得更清洁，更漂亮，更结实，因为这里的湖水更纯洁，你可以很容易地把它们区别出来。

At night there was never a traveller passed my house, or knocked at my door, more than if I were the first or last man; unless it were in the spring, when at long intervals some came from the village to fish for pouts — they plainly fished much more in the Walden Pond of their own natures, and baited their hooks with darkness — but they soon retreated, usually with light baskets, and left "the world to darkness and to me," and the black kernel of the night was never profaned by any human neighborhood.

从没有一个人在晚上经过我的屋子，或叩我的门，我仿佛是人类中的第一个人或最后一个人，除非在春天里，隔了很长久的时候，有人从村里来钓鳘鱼，——在瓦尔登湖中，很显然他们能钓到的只是他们自己的多种多样的性格，而钩子只能钩到黑夜而已——他们立刻都撤走了，常常是鱼篓很轻地撤退的，又把&世界留给黑夜和我&，而黑夜的核心是从没有被任何人类的邻舍污染过的。

At length you slowly raise, pulling hand over hand, some horned pout squeaking and squirming to the upper air.

到后来，你一手又一手，慢慢地拉起钓丝，而一些长角的鳘鱼一边发出咯吱咯吱的声音，一边扭动着身子，给拉到了空中。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。