丝球期

例句：

1. 1. The silkworm stage is crucial for the growth of the silkworm.
   蚕丝阶段对于蚕的生长至关重要。
2. 2. During the silkworm stage, the silkworm undergoes various physiological changes.
   在蚕丝阶段，蚕会经历各种生理变化。
3. 3. The silk industry relies heavily on the silkworm stage.
   丝绸产业严重依赖蚕丝阶段。