grain seed的用法和樣例：
例句
- A self-fastening method is introduced by which a cleat-shaped seed crystal is fixed in the swallow-tailed groove.
本文介紹一種在提拉法中使用的晶種劈形自緊固方法。 - But ever finer control of the temperature gradient around the seed is eliminating the telltale imperfections that jewelers could once detect with a magnifying glass.
然而，一種能更精細控制晶種周圍溫度梯度的方法，正逐漸去除這種遮掩不了的瑕疵。
