dragon's teeth
plural noun
- Brit. informal concrete obstacles pointing upwards from the ground in rows, used against tanks in the Second World War〈英, 非正式〉龙牙（第二次世界大战中使用的一种楔形防坦克混凝土障碍物）。
短语
sow（或 plant）dragon's teeth
- take action that is intended to prevent trouble, but which actually brings it about播下（本欲防止麻烦而实际上却带来麻烦的）祸种, 种下祸根。
词源
with allusion to the teeth of the dragon killed by Cadmus.