geometric spreading的用法和樣例：
例句
- The radioactive cloud reaches a height of several miles before spreading out abruptly into a mushroom shape.
放射性雲在上升達幾英里高度后才猛然散開成蘑菇狀。 - Spreading out and taking evasive action was the natural reaction to concentrated flak ahead, but it was forbidden for two reasons.
面對前方猛烈高炮火力，本能反應是散開隊形，做出閃避動作，但由於兩個原因，這種本能反應遭到禁止。
