The magnet and yoke are fully encapsulated during the molding process to completely surround the magnet and yoke in a protective plastic shell.

磁体和轭在成型过程中进行完全封装，以便将磁体和轭完全包围在保护性塑料壳内。

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Such photovoltaic cells rely on conventional plastic polymers to provide a protective backing, also known as backsheets.

这种太阳能电池通常用塑料聚合物提供保护支撑体，也就是所谓的backsheets。

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However, this protective barrier or "plastic wall" also makes it harder to gain access to the cellulose.

然而同时，这种保护性屏障或者塑料墙壁也使我们更难从植物中得到纤维素。

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As is the case with comics that are diligently kept unread in plastic protective sleeves and toys that are stowed away in their original packaging, there are a number of reasonably affordable cars and trucks from recent model years experts say are worth holding onto for their appeal to future generations of enthusiasts.

FORBES: Current Cars That Could Become Collectible

Kris Hedstrom, the director of CHEP's Innovation Center, which adjoins the plant, is wearing earplugs, protective glasses and hard plastic shoe covers over his toes.

FORBES: Beast of Burden

She wears a bulbous orange nylon protective garment and a clear plastic helmet.

NEWYORKER: Call the Doctor