Fales grain的用法和樣例：
例句
- If we could actually see the path described by a particle,such as a sand grain in the rock.
假如實(shí)際上，我們能看見(jiàn)由一個(gè)象巖石內部的砂粒這樣的微粒繪出的軌跡。 - See a floor first arenaceous smooth surface is slick, have without grain bosomy protruding, cork grain is pure.
先看地板砂光表面是否光滑，有無(wú)鼓凸顆粒，軟木顆粒是否純凈。
