使用脱模剂可能造成短射（缺料），鱼眼纹，条纹，表面斑点，或影响透明度。
Mold release agents cannot be used as shortmolding, fish-eye marks, streaking and blurring would occur.
1664年，胡克观察到了那颗行星表面的一个微红的斑点。
In 1664 Hooke observed a reddish spot on the surface of the planet.
研究星团的天文学家已经注意到质量一定的行星(通过追踪表面阴暗冷却斑点来测量)，其旋转速度随着其星龄呈现可预测性的变化。
Astronomers who study star clusters have noticed that the speed at which a star of a given mass spins (measured by tracking cool, dark spots on the surface) also seems to vary predictably with age.
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