A tyre expands when you pump air into it. 轮胎一打气就鼓起来。
My front tyre needs to be pumped up. 我车子的前胎需要打气。
A rubber spherical balloon is quickly blown up in an angry sea by a ditched pilot. 一个迫降的飞行员在波涛汹涌的海上向一个橡皮球迅速充气。
Instead of the surety of failure he felt confidence rising in him as a tyre begins to fill with air from a slow pump. 他感到的不再是肯定会失败，而是鼓起了信心，就像气泵使车胎慢慢地充气一样。
