Webb's sharper view also hints at possible jets from the central star. The dark lane and the way gas appears to push outward near the top of the nebula suggest an ejection that may be shaping the cloud's symmetry, a common feature when aging stars throw material in opposite directions.
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，详情可参考夫子
const realIdx = i % len; // 取模映射到真实数组索引，模拟循环
provide as much warning as possible up front to users when enabling it