Some improvement in insulating board composition, in shaping process and lining technology can effectively reduce the skin hole.

从中间包绝热板的配方、制造技术和装砌等方面采取改进措施，可有效减少铸坯皮下气泡。

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Through this hole, the patient's intestines push out, producing a lump underneath the skin.

病人的小肠通过这个缺损向外突出，形成皮下的包块。

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The reason and prevention of four kinds defects including surface wrinkled skin (carbon built-up), chock, blow hole, deformation, was introduced in this part of the article.

本部分主要介绍表面皱皮（积碳）、呛火、气孔、尺寸超差及变形等缺陷的产生原因和防止方法。

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Each hair on a person's head grows from a single tube-like hole in the skin called a follicle.

VOA: special.2011.04.05

He experienced firsthand the impact of humanity on the environment when under the hole in the ozone layer at the South Pole, the harsh ultraviolet rays from the sun burned his skin and permanently changed the color of his eyes.

CNN: The polar explorer searching for green warriors