Stable physical properties, the outer coating is prone to scratches.

物理性质稳定，外涂膜易出现划痕。

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The inner coating stress of pipeline is less than the outer coating stress.

管道内瓷层的受力状态好于管道外瓷层。

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The outer coating of oats contains a high concentration of soluble fibers, which help trap cholesterol and move it quickly through the intestines.

燕麦的外衣含有丰富的易溶纤维，有助于凝结胆固醇，使其迅速地穿过肠道。

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The outer coating is an acidic polymer that can withstand the harsh stomach environment.

FORBES: Hard to Swallow

The grey stands in contrast to the weathered red outer-coating of the Sheepbed unit, and the darker colour hints at a different oxidation state for iron (Fe) minerals that might be inside the rock.

BBC: Nasa's Curiosity Mars rover to ingest drill sample soon

What we notice in these different batches is a progression to higher and higher levels of specification, including, in the latest batch, an anodized coating on extremely smooth inner and outer surfaces.

CNN: Transcript of Powell's U.N. presentation