natural regeneration

• 天然更新

natural regeneration的用法和样例：

例句

1. The results show that the main foctor that affects the natural regeneration is elevation, and the coverages of litter and brushwood were next.
   结果表明，影响该区森林天然更新的主要因素是海拔高度，其次是灌木层盖度和枯落物层的盖度。
2. However, the skin's natural rejuvenating processes begin to slow down as time passes by.
   但是，随着年龄的增长，肌肤自然更新的周期便会开始减缓。