The cell is soft, like a tiny balloon full of juice.

细胞柔软，像充满液汁的小气球。

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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

This, however, has a tiny balloon at its business end.

ECONOMIST: Medicinal light-swords

The next step was to thread a tiny surgical balloon and a thin stainless-steel stent into the artery to forcibly widen the passage.

CNN: Just How Bad Was It?