the balloon expanded then exploded 气球先是膨胀
the balloon expanded
气球膨胀了
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The balloon expanded, then exploded.
气球先是膨胀，然后就爆破了。
youdao
The balloon expanded as it was filled with air.
那气球因填满了空气而膨胀。
Now the glowing ball expanded quickly, rising like a helium balloon.
现在，这个发光的球体迅速扩大，像氮气球一样升起。
Using general anesthesia, the surgeon threaded a catheter up her nose, expanded a tiny balloon and cleared a permanent space for her sinuses to drain.
FORBES: Balloon Therapy
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