In the northern Pacific Ocean, when a marine biologist was...

When analyzing the records of the U.S. Navy tracking the submarine, he accidentally captured a low, repetitive sound that was the same as the law of the red sleeves that humans understood. Judging from the sound, it was a baleen whale.
(2) Because they were in an endless deep blue, baleen whales did not have a sensitive sense of smell, but they could transmit their voices from a thousand miles away. Today, there were two known types of whales in the ocean: The toothed whales that feed on food, such as sperm whales, killer whales, dolphins, etc. The other type feeds on the comb-like baleen in their mouths. Baleen whales that feed on filter-feeding, such as blue whales and gray whales. The toothed whales hummed a variety of sounds through the nostrils on their heads, from short chirps to ultrasonic waves. They were adept at echolocation hunting. The way baleen whales fed did not require precise echolocation, and they did not hum ultrasound. Instead, they sang deep songs through their throats. Baleen whales in different sea areas all over the world had their own unique songs.
Because the throat of baleen whales did not have a structure like vocal cords, humans still did not know how they did it.
The scientists began to track the singing baleen whale. After tracking it for 12 years, people could know for sure that it traveled an average of 47 kilometers a day, but they could not know its destination. Its whereabouts were either east, west, south, or north. There was no clue, but it never lingered in a place, nor did it stay in a place for a long time. For so many years, it had always maintained a perfect state of solitude, swimming alone in the sea. It had no family, no friends, and did not belong to any race.
Later, scientists finally found out why the whale was lonely. It turned out that the frequency of its singing was very special. The frequency of communication between Red Sleeves Adding Fragrance was generally 15 - 25 Hertz, and its frequency was 52 Hertz (the frequency of 50 - 52 Hertz was similar to the lowest part of the bass, or slightly higher than the lowest part of the tuba). It did not belong to any group of whales that had been recorded by humans. Therefore, the signal it sent out was seriously out of tune, and its companions would never be able to receive it. Although it had been singing for so many years, in the eyes of its companions, it was like a mute.
Later, scientists discovered that the voice of this red sleeve added fragrance was actually the same as that of a dolphin, so it mastered a foreign language. Unfortunately, due to the difference in the sea area, even if the dolphins received this frequency, they would not be able to detect it. They couldn't meet immediately. As a result, the blue ocean became the stage for this red sleeve to perform a one-man show. It traveled alone in the vast waters, singing to itself, and only it understood its own feelings.
And Ling, the story of the red sleeves adding fragrance was not over yet. Ever since he found the loneliest red sleeve in the world. More than 20 years had passed, and its frequency had gradually decreased. If one day, it met a red-robed girl who sang out of tune. Would it be a very happy thing?
1. The title of the article says that this is "A red sleeve that sings out of tune adds fragrance." Do you know what this is after reading the article?
2. What was the main content of the second paragraph?
3. What kind of explanation method is used in the highlighted sentence in the text? What was its use?
4. Explain the effect of adding some words to the following sentences.
(1) Because they were in an endless deep blue, baleen whales did not have a sensitive sense of smell, but they could transmit their voices from a thousand miles away.
(2) The scientists also discovered that the voice of this red sleeve added fragrance was actually the same as that of a dolphin, so it had mastered a foreign language.

Answer 1

In the waters of the northern Pacific Ocean, when marine biologists were studying the underwater plants, they discovered a strange creature. This creature has beautiful red hair and big blue eyes, and it sings beautifully, but there's a very strange problem: it sings out of tune!

The marine biologists were very excited because they had always thought that this creature's song was very unique. They began to study the creature and found that it was actually a marine creature called "Hong Xiu." Hong Xiu was a very intelligent and agile creature. She could swim freely at the bottom of the sea and had a beautiful song.

The marine biologists were very fond of Hong Xiu, and they began to design a special singing technique for her so that she could sing better. After a period of hard work, Hong Xiu's singing skills had improved greatly. In the end, Hong Xiu became a very famous marine biologist and sang many beautiful songs at the bottom of the sea.

This story tells us that everyone has their own uniqueness. As long as we work hard to discover and develop our potential, we can create a beautiful world that belongs to us.