What do the words "throat" and "yinghe" in "Spring" mean respectively?

The birds settled their nests among the flowers and leaves, became happy, showed off their crisp "throats" to their friends, and sang melodious songs, "in harmony" with the breeze and flowing water.

Throat: singing voice, voice.

Yinghe: cater to, echo.

"Spring" is a masterpiece by the modern essayist Zhu Ziqing. Among them, the two words "throat" and "yinghe" actually use personification.

Extended information:

The creative background of "Spring": The article was written around 1933. At this time, the author Zhu Ziqing had just returned from his European tour, and had a happy marriage with Ms. Chen Zhuyin. Later, he gave birth to a son. At the same time, he served as the dean of the Chinese Literature Department of Tsinghua University. His life was filled with good things and a happy life.

Zhu Ziqing, whose original name was Zihua and whose nickname was Qiushi, later changed his name to Ziqing and whose courtesy name was Peixian. Modern Chinese essayist, poet, scholar, and democracy fighter. Originally from Shaoxing, Zhejiang, he was born in Donghai County, Jiangsu Province (now Pingming Town, Donghai County, Lianyungang City). He later settled in Yangzhou with his grandfather and father, claiming that "I am a Yangzhou native."

Graduated from middle school in 1916 and successfully entered the preparatory school of Peking University. He began publishing poetry in 1919. In 1928, the first collection of essays "Back" was published. In July 1932, he was appointed director of the Department of Chinese Literature at Tsinghua University. In 1934, "Miscellaneous Notes on European Travel" and "Miscellaneous Notes on London" were published. In 1935, he published a collection of essays "You and Me". He died in Peiping due to gastric perforation on August 12, 1948. He was only 50 years old.

Reference: Baidu Encyclopedia—Zhu Ziqing