impairments are expensive, not stable under sunlight, and require frequent re-calibration and substantial, relatively immobile setups," said Xiaoyi Zhang, a researcher at Microsoft who developed the technology.

　　"To ease the drawbacks...we created GazeSpeak, an eye-gesture communication system that runs on a smartphone, and is designed to be low-cost, stable, portable and easy to learn."

　　The app is used by the listener by pointing their smartphone at the speaker. A chart that can be stuck to the back of the smartphone is then used by the speaker to determine which eye movements to make in order to communicate.

　　The sticker shows four grids(网格) of letters, which each correspond to a different eye movement. By looking up, down, left or right, the speaker selects which grids(网格) 24the letters they want belong to. The artificial intelligence algorithm is then able to predict the word or sentence they are trying to say.

　　Zhang's research, Smartphone-Based Gaze Gesture Communication for People with Motor Disabilities, is set to be presented at the Conference on Human Factors in Computing Systems in May.

1. Which of the following is the correct order of how the app works?

a. The sticker puts forward four grids of letter.

b. The listerner points the phone at the speaker

c. The speaker uses a chart to determine which eye movement to make.

d. The users use their eye movements to select the grids of letters they want to choose.

A. bacd B. bcad C. bdca D. Bcda

2. Which of the following is not the advantage of Gazespeak?

A. Unsteady B. Easy to take C. Easy to learn D. Inexpensive

3. Which can be the best title of this text?

A. A Helpful Communicator For ALS

B. Smartphone App Helps ALS Sufferers Speak With Their Eyes

C. The Greatest communicative App For ALS

Smartphone--based Gaze Gesture communication