2 Inconspicuous Bottle

指导老师：乐永康

Put a lit candle behind a bottle. If you blow on the bottle from the opposite side, the candle may go out, as if the bottle was not there at all. Explain the phenomenon.

1. accuracy和precision在含义上的区别？
2. limits从哪些方面来考虑？
3. 怎么准备仪器？