黄博彦的回答：

cracker： firework consisting of a small explosive charge and fuse in a heavy paper casing 同义词：firecracker 例句： The boys light crackers in the street. 男孩们在街道上放鞭炮。 firecracker firework consisting of a small explosive charge and fuse in a heavy paper casing 同义词：cracker 例句 Chinese children like to buy many firecrackers before the Spring Festival. 中国孩子会在春节前买很多鞭炮 firework (usually plural) a device with an explosive that burns at a low rate and with colored flames; can be used to illuminate areas or send signals etc. 例句 The climax of the celebration was a firework display. 庆祝会的高潮是燃放烟火。 所以，cracker和firecracker是对等同义词。 但是firework是范围更大的词汇。