1·EXAMPLE: The old truck made a sudden backfire which sounded like a firecracker.
旧卡车突然出现回火，声音像放爆竹一般。
2·The generosity of parents can also backfire. There does come a point where parents have to stop helping, and also credit card companies have made debt far too accessible.
这些甚至会让慷慨的父母回火，建议说父母停止对孩子的帮助，也是由于信用卡公司允许他们的贷款额度远远超过实际承受力。
3·Practice shows that the burner is characterized by high burning stability, low backfire rate and flameout rate.
实践证明，该燃烧器燃烧稳定，具有极低的回火率以及离焰率。
4·It is proved in practice that the burner have high burning stability, low backfire rate and low flameout rate.
实践证明，该燃烧器燃烧稳定，具有极低的回火率以及离焰率。
5·Backfire: an explosion of prematurely ignited fuel or of unburned exhaust gases in an internal-combustion engine.
回火：过早点燃的燃料的爆炸或内燃机中未燃的废气的爆炸。