This will require considerable dexterity from the user, the report says; the entire finger must be scanned each time in a fluid, moderately-paced, moisture-free swipe.

报告称，这要求用户相当灵巧，每次识别都需要手指干燥，并且要流畅、匀速滑动。

Place unit on a clean workbench, in a dust - free and moisture-free room. Handle all parts carefully, and protect them against corrosion and impact damage after disassembly.

在一个无尘、无水汽的房间内，将部件放置在工作台之上。当部件分解开以后，要小心拿取，以免因腐蚀或碰撞造成损伤。

This impervious layer or boundary will retard the free diffusion of moisture. This condition is referred to as case hardening.

这一不透气的壳层(或边界层)会阻滞水分自由扩散，这种情形称为表面硬化。

But its fortifying magic works wonders to combat moisture-free air and hat head.

WSJ: Maintaining the Gloss | Outer Beauty