The problem is how to weight the various rings.

问题是如何对各个圆进行加权。

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Loose hole plating chromic layer by weight used in the sliding friction parts and heat resistance, corrosion, wear parts, such as internal combustion engine cylinder lumen, piston rings.

松孔镀铬层应用于受重压的滑动摩擦件及耐热、抗蚀、耐磨零件，如内燃机汽缸内腔、活塞环等。

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The structural unit of extract consists primarily of aromatic rings and cycloparaffinic rings. The average molecular weight of the extract is 448. The aromaticity is 0.53.

萃取物的结构单元主要由芳环和脂环所构成，萃取物的平均分子量为448，芳碳率为0.53。

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Those worried that undue weight is being put on data from the tree rings of a dozen larches on the Yamal peninsula in Siberia, a topic that exercises Mr McIntyre, will be interested to see that some climate scientists shared some of their worries.

ECONOMIST: Leaked e-mails do not show climate scientists at their best