1. The teenagers like to let off firecrackers.
   青少年喜欢燃放鞭炮。
2. The firecrackers popped.
   爆竹啪啪地响。
3. They had to let off firecrackers by way of apology.
   他们得放鞭炮赔礼。
4. The firecracker went off with a bang.
   炮仗砰地一声点响了。
5. The damp firecrackers fizzled out.
   这些受潮的爆竹嘶嘶地响过之后就灭掉了。

　1个名词解释