他大概猜想这种物质具有固体颗粒会堵塞小孔。
He probably suspected it had solid particles that would block the holes.
当这些颗粒覆盖到某一表面时，就能堵塞表面细缝，从而减少灰尘、水分和细菌的黏附。
When they are applied to a surface, these particles block the minute crevices in it, reducing the scope for dirt, moisture and bacteria to cling to the surface.
长期以来科学家发现，密集的低密度脂小颗粒偷袭进入动脉壁，比蓬松的大颗粒更容易堵塞血管。
Scientists have long known that small, dense LDL particles sneak into the artery wall to build up and narrow blood vessels more easily than larger, fluffier particles.
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