2000s，where he found that 15%­30% of children under 5 were at the risk of going blind because they didn't get enough vitamin A．Dale also learned that people there love bananas.They eat 3 to 11 bananas a day.So he came up with an idea to plant bananas containing added nutrition in order to improve Ugandans' health.With the help of Bill Gates' foundation，Dale developed the “super banana”．He added a gene to the fruit，making it rich in vitamin A.

　　Coaching basketball

　　Basketball is popular worldwide，partly because you only need a hoop (篮框)and a ball to play the game.But this simple game experienced a technology makeover with the development of a smart sensor basketball.

　　The ball，called the 94Fifty Basketball，has 9 sensors inside.They can tell you anything from how fast you are going to how accurate your shot angles are.

　　With a Bluetooth chip inside，the basketball can connect to your smartphone and tell you in the voice of a coach to “snap your wrist”or “go faster”，depending on the data.

　　The hovercraft

　　Thanks to the California­based company's product Hendo，flying past your friends on a floating board could soon become a reality.

　　The hovercraft has 4 small engines.These create a special magnetic field which produces enough force to lift the board off the ground.

　　At the moment，the hoverboard(悬浮滑板)can only float an inch off the ground for 15 minutes and must fly over a metal material.It's expensive too，at $10,000，but the company hopes that one day the technology could be used.

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