ENG翻譯作Chinese

The leader of the brass section is the French horn. But when it was first made nobody used it indoors because it sound harsh. In France the nobility used the horn during hunts and made up special codes to signal each other. It was even used by the night watch to call when there was trouble.
Even though it is called the French horn it first began to be developed in Germany. It was completed as we know it today in France. So that's why we call it a French horn. Some French horns are really two horns in one. They have two sets of tubing. The player switches between the two sets of coiled tubing by working a valve with his left thumb. One set of tubing gives a mellow, rich, deep tone. And the other makes a higher, brighter sound.