例句與造句

1. And rigid seats would be painful, but any soft surfaces will move a bit as you sit on them.
2. It said slightly more than half of the slides and climbing devices in playgrounds were higher than 6 feet, and just over 40 percent had swing sets that were hazardous, often because the swings were too close together or had rigid seats.
3. It's difficult to find rigid seat in a sentence. 用rigid seat造句挺難的