听力音频：
L1
讲座
1. What is the main purpose of the lecture?
To describe how robots perform a variety of tasks
To explain how humans learn to grip different objects
To explore difficulties that arise from particle jamming
To present a solution to a problem in robotics
2. What difficulty with creating a gripper based on the human hand does the professor describe?
Designing fingers that are as flexible as human fingers
Determining the optimal size for the gripper
Programming the gripper to pick up a variety of objects
Developing an arm with an appropriate range of motion
3. Why does the professor discuss jamming?
To describe a design flaw in traditional grippers
To explain one of the operating principles behind the new gripper
To suggest that sand has better jamming properties than coffee grounds
To illustrate a property unique to liquids
4. Why do the speakers discuss sand?
To give an example of a substance that is difficult for a robot to pick up
To explain why sand was used to fill the gripper bag
To describe an experiment the student conducted
To illustrate that granular materials can behave like liquids and solids
5. What limitation of the new gripper do the speakers discuss?
Its inability to pick up soft objects
Its failure to propel objects very far
Its reliance on complicated computer programming
Its lack of strength for gripping heavy objects
6. What is the professor’s opinion about the new gripper?
Its design is overly complex.
Its advantages outweigh its disadvantages
Its capabilities are disappointing
Its ability to recognize different objects makes it unique.
