单词：twin booster
twin booster的用法和样例：
例句
- We saw the booster rockets disengage and fall into the sea.我们看到火箭助推器脱落后坠入大海。
- NASA is now checking on the damage of lightning on Endeavor and its solid rocket booster.国家航空航天署正在检查奋进号航天飞机及其固体火箭助推器是否被闪电损坏。
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