Leaping on a narrow balance beam（平衡木） is not easy. But Lola Walter, a 13-year-old gymnast, is an expert at it. To perfect her skills, Lola 31 for four hours a day, five days a week. At the state championships in March, she finished seventh out of 16 girls. That’s especially impressive. 32 she is legally blind, born with a rare condition that causes her eyes to shift(移动） constantly. She often sees double and can’t 33 how far away things are. When she was little, her mom 34__ that even though she couldn’t see 35�