In the late Eastern Han Dynasty, the country was in confusion.东汉末年，天下大乱。
In order to reunite the country, Liu Bei paid a visit to Zhu Geliang who had hidden himself in the countryside.刘备为统一天下，特意拜访隐居的诸葛亮寻求帮助。
He went there twice but didn"t see Zhu Geliang. Then the third time he finally met him. 他连去了两次都没见到诸葛亮，第三次才见到了他。
Liu Bei explained why he came and explained his noble ambition to Zhu Geliang.Zhu Geliang also proposed some very good strategies.刘备说明来意，并畅谈了自己的宏图大志。诸葛亮也提出了周详的战略方针。
After listening, Liu Bei was so happy, he appointed Zhu Geliang as his military advisor.He said: "Zhu Geliang to me is as water is to fish."刘备听后大喜，于是立诸葛亮为军师。他说：“我刘备有了诸葛亮，就好像鱼儿有了水一样。”
With the assistance of Zhu Geliang, Liu Bei"s power expanded rapidly, and finally he realized his goal.刘备在诸葛亮的帮助下，势力不断扩大，最终实现了目标。
Nowadays, this phrase is often used to describe the person who stays in the environment which suits him/her perfectly, or someone who is very adept at using the suitable or right methods.如今,这个短语常常被用来形容一个人处在完全适合自己的环境中，或者一个人能够熟练地应用合适的或正确的方法。
【文化链接】
“如鱼得水”用英文可以表达为“feel just like a fish in water”，我们来看一个例句：
I"ve wanted to study at Beijing University my whole life. I also love the culture and the weather in Beijing. I feel just like a fish in water.去北京大学学习是我一生的梦想。我还喜欢北京的文化气氛和天气。我在北京简直就是如鱼得水。
看故事学英语：指鹿为马call black white (and white black)
In Qin dynasty, there was a powerful and evil counselor named Zhao Gao.在秦朝，有个很得势的奸臣叫赵高。
Zhao Gao wanted to rebel, but he didn"t know how many people in the court would stand by his side.赵高想造反，但是又不知道群臣中有多少人会支持他。
So he worked out a way to test the people.于是他想了个办法来测试。
He presented a deer as a tribute to the emperor in front of the court, and said that it was a swift horse.他在群臣面前送了一头鹿给皇上，并说这是一匹千里马。
The emperor not accepting his statement said, "This is obviously a deer."皇上不信，说“这明明是鹿啊。”
Then, Zhao Gao took this opportunity to ask the court, "Is this a deer or a horse?"然后赵高借机问各位大臣，“这是鹿还是马？”
In the court, those who didn"t dare to go against Zhao Gao agreed with him and said that it was a horse, those who dared to go against Zhao Gao said that it was a deer.在大臣中，不敢反抗赵高的都赞同说是马，敢于反对赵高的说是鹿。
Later, Zhao Gao remembered the counselors who didn"t agree with him and persecuted them to solidify his power.后来，赵高记住了这些反对他的人并加以迫害，以巩固自己的势力。
This story is still popular even today. People use this idiom to describe someone who calls white black.这个故事流传至今，人们用这个成语来形容一个人颠倒黑白。
【文化链接】
英语中表达“指鹿为马”意思的短语可以用“call black white (and white black)”，意思也就是“把黑的当白的，把白的当作黑的”，这样也就是颠倒是非啦~
看故事学英语：对牛弹琴cast pearls before swine
During the Warring States Period, there was a musician named Gongming Yi, who played musical instruments very well.战国时代，有一个叫公明仪的音乐家，他很会弹琴。
There were a great number of people fond of listening to him play, and respected him very much.很多人都喜欢听他弹琴，人们很敬重他。
One day, Gongming Yi saw a cow when he was having fun in the countryside.一天，公明仪在郊外游玩时，看到了一头牛。