＜正＞It can be very difficult for people in wheelchairs to move around on beaches.Most beaches don’t have ramps （斜坡） or special walkways to allow disabled visitors to move around easily,or to get in and out of the sea safely.Seatrac is a system that was designed to solve this problem.Seatrac is basically a chair on a moving ramp that can smoothly carry a disabled person into the sea.Once in the sea,the person can either remain in the chair,enjoying the water,or go for a swim.The Seatrac system can help anyone who has a hard time walking,including older people and pregnant women.
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