const time = (target - pos) / sp;
如果你直接把物体放进去，可能会发现一片漆黑。为什么？因为在 3D 世界里，除了特殊的“基础材质”，大多数材质都需要光才能被看见。
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ESRESR has already launched its Samsung Galaxy S26 cases, with a new clear case. There's a model available for every size of the S26, including the S26+ and S26 Ultra. The thin, clear case features military-grade drop protection and magnetic charging compatibility. Around the camera is a built-in phone stand so you can watch horizontal video anywhere.