Keep objects a minimum distance from the user as objects too close to the viewer can cause confusion and simulator sickness.

让对象离玩家有一个最小距离，因为离视口太近会引起疑惑和眩晕症。

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Low frame rates, low quality assets and other issues can completely ruin the experience and sometimes lead to simulator sickness.

低帧率，低画质和其他事情会完全毁掉体验，有时会导致模拟病。

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