air core的用法和樣例：
例句
- To take samples that retain the larger structure of the sediment, a core sampler is used.
為了保持樣品沉積物的層次結構，就要用空心鐵管采樣器。 - But now hollow rubber tyres are fitted on to wheels and the air acts like a soft cushion to help smooth out the bumps in the road.
可是現在給輪子按上空心橡膠輪胎，然后打足氣，空氣起著(zhù)柔軟的緩沖器那樣的作用，幫助清除在路上碰到的東西。
