靶眼
- 网络bullseye
靶眼-
喜欢这种刺激运动的人会先在头顶平衡一下锋利的短柄小斧和双刃斧，瞄准位置，然后再向彩色的木制靶眼投过去。
Adrenalin junkies can get their fix by balancing sharp hatchets and double-edged axes over their heads before hurling them at painted wooden bullseyes .
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基于约束优化方法的三维多靶井眼轨迹设计模型
A model for design of three-dimensional multi-target wellbore trajectory based on restricted optimization