If you have the grain going the wrong way the paper will ripple, the fold will not be clean and the book will want to close itself.
如果把纸的纹路弄反了，纸就会起皱，折边也不整齐，书还总是会自己合上。
Fold the letter AD put it into the envelope and then close it.
把信折叠起来并且把它放进信封并且关上信封。
It has close relationship with racial difference. It exists in Mongolian inCentral Asia, North Asia and East Asia mostly, so it is also called "mongoloid fold".
内眦赘皮与种族差异有着密切的联系，最常见于中亚、北亚、东亚等地区的蒙古人种中，故又称“蒙古皱襞”。
In close contact with three smooth, is strictly prohibited in a gap between fold.
三者依次平稳紧密接触，中间严禁有间隙式褶皱。
The changes of the flow condition and velocity of the nail-fold microcirculation were in close correlation with the increase of blood viscosity and the severity of the disease.
甲皱襞微循环流态和流速改变与病情和血液粘度增高程度有一定平行关系。
Repack unused product in anti-moisture packing, fold to close any opening and store in a dry place.
重新包装未使用的产品置防潮袋密封好之后贮存在干燥的地方 。
Repack unused product in anti-moisture packing, fold to close any opening and store in a dry place.
重新包装未使用的产品置防潮袋密封好之后贮存在干燥的地方 。
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