natral enemies

• 天敌

natral enemies的用法和样例：

例句

1. The combined activities of aphid enemies overtake reproduction by the aphids.
   蚜虫天敌的联合活动超过蚜虫的繁殖力。
2. Boththe aphids and the natural enemies occurred with a regular pattern in different years.
   蚜虫与天敌在不同年际间也呈现出一定的规律性变化。