粒度

例句：

1. 1. The grains of sand are so fine that they can hardly be seen.
   沙子的颗粒如此细小以至于几乎看不见。
2. 2. The texture of the fabric is very coarse, which makes it uncomfortable to wear.
   这种织物的质地非常粗糙，穿着不舒服。
3. 3. The granules in the powder are small enough to pass through a sieve.
   粉末中的颗粒足够小，可以通过筛子。