- The aggregates, composed of the primary particles, retain sufficient water and nutrients.
由原颗粒组成的团聚体要能保持充分的水分和养分。
- The base surge of dirt particles moves outward from the center of the explosion and is subsequently carried downwind.
由尘埃颗粒组成的基浪从爆炸中心向外移动，继而顺风散开。
