pyro*tech-nics /.paira'tekmks/ noun 1 [u+sing./pl. v.] 术语)fireworks or a display of fireworks 烟 花；’■烟火的施放.2 [pi.] a clever and complicated

display of skill, for example by a musician, writer or speaker (音乐家、作家、演讲者等技巧的展示： gutor pyrotechnics 吉他演奏技巧的展示► pyro.tech.nic adj. [usually before noun]

Pyr-rhic vic-tory /.pirik 'viktari/ noun a victory that is not worth winning because the winner has suffered or lost so much in winning.it得不偿失的胜利；以惨 重代价换取的胜利.【•】•■制d From Pyrrhus, the king of Epirus who defeated the Romans in 279BC but lost many of his own men.源自伊庇鲁斯国王皮洛士，

他于公元前279年打败罗马人，但自己的部队也伤亡 惨重。

Py-thag-oras^, the-orem /pai'Gaegerasiz 'Giaram; NAmE '0i:e-; '0ir-/ noun {geometry JL fcj) the rule that, in a RIGHT-ANGLED TRIANGLE/RIGHT TRIANGLE, the SQUARE

n.{4) of the hypotenuse (= the side opposite the right angle) is equal to the squares of the other two sides added together勾股定理；毕达哥拉斯定理 py*thon /'paiGen; NAmE -Gain/ noun a large tropical snake that kills animals for food by winding its long body around them and crushing them 蟒；蛛蛇