Originally a high-jumper, Mr.Liu made an unusual switch into hurdling at age 15, after his original sports school had given up on him.
刘翔最初是个跳高运动员，15岁那年他原来的体校放弃了他，他因此转向了跨栏项目，这在运动员中是不多见的。
The user can jumper junction box sensor sensitivity switch from low to high jump position.
用户可以将接线盒内传感器的灵敏度跳线开关从低跳到高的位置。
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