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汉语拼音：tuì huà

1.生物体在进化过程中某一部分器官变小，构造简化，功能减退甚至完全消失，叫做退化。如鲸、海豚等的四肢成鳍状，仙人掌的叶子成针状，虱子的翅膀完全消失。

2.泛指事物由优变劣，由好变坏。

1. 动植物的种类或某一器官逐渐变小，机能减退，甚至完全消失的现象。

   曹靖华 《飞花集·尾尾“没六”洞中来》：“如果长期生长地下，视觉不用，应该退化。”

2. 指事物的衰败倒退，由优变劣，由强变弱。

   清 容閎 《西学东渐记》：“签名书中，思有以阻止 中国 为此退化之事。” 胡适 《国语文法概论》第二编：“最错误的见解就是误认白话为古文的退化。” 蒋子龙 《乔厂长上任记》：“这些年，工人受了欺骗、愚弄和呵斥，从肉体到灵魂都退化了。”

• This difference is often accompanied with the partial or complete abortion of the reproductive organs.

  这种差异往往伴随着生殖器官一部分或全部的退化。

• They were also anxious to use chemical fertilizers to make up for soil deterioration -- which in turn created a vicious circle, he said.

  他说，农民同时急于使用化肥，以弥补土壤的退化，而这就造成了恶性循环。

• And the major concern about this novel is the reason of degeneration of mankind and the ultimate form of antagonism between classes.

  主要着重于探讨其揭示出来的阶级对抗的极端形式和人类退化原因的意义。

• Easy to say, then the small fly like a baby back overnight degradation.

  简单来说吧，那时的小飞仿佛一夜之间退化回到了婴儿时代。

• The point is simple: Consumers are always going to search for a deal, and this demand is not diminishing.

  这个关键点很简单，顾客总是在搜寻中意的交易，这种寻求是不会退化的。

• Choi Fung said the "use after automatically decomposed plastic sheeting, " is actually a degradation of plastic sheeting.

  彩峰说，“使用后，自动分解塑料薄膜，”其实是一个退化的塑料布。

• Houssaye said "the legs were very regressed" in this snake, which she added is not the world's oldest snake, but it comes pretty close.

  乌赛说“这种蛇的腿退化的很彻底”。她又说，它不是世界上最古老的蛇，但是很接近

• But we argue that it's equally possible that this could already be a [shell] reduction in an earlier turtle that we haven't found.

  然而我们认为，也有可能这是我们之前从未发现的早期龟类已经退化了的外壳。

• I have had no doubt that I could have lost my skill of driving.

  我从来不曾怀疑我的驾驶技术是否退化。