Talk about the main content of the text bat and radar.

The text mainly tells that scientists have uncovered the secret that bats can fly at night through repeated experiments, and have been inspired to install radar on the plane to solve the problem of flight safety at night.

First, ultrasound:

Bats emit ultrasonic waves and radars emit radio waves. The text mainly tells that scientists have uncovered the reason why bats can fly at night through repeated experiments, and have been inspired. They have installed radar on the plane to solve the problem of safe flight at night.

The "information kit" on the back page of the text briefly introduces the modern emerging discipline-bionics.

The purpose of writing this text is to let students grasp the main points in reading and accurately grasp the main content of the article. At the same time, stimulate students' interest in reading popular science articles and broaden their horizons.

Second, bionics:

Bionics is a science that studies the structure and properties of biological systems in order to provide new design ideas and working principles for engineering technology, and it belongs to an interdisciplinary subject that combines biology and technology.

Biology has become the goal of bionics as long as it has unique skills. Now it has developed insect bionics, marine bionics, design bionics, chemical bionics, molecular bionics and so on.

The research results of bionics are widely used in military, medicine, manufacturing, aviation and other aspects, involving various types of scientific fields, and have a very close relationship with human production, life and future development. As an independent discipline, it was formed in the 1960s.