n.士的宁，马钱子碱

Strychnine is a highly toxic alkaloid found in certain seeds.
奎宁是一种在某些种子中发现的高度有毒的生物碱。
The poison used in the murder was identified as strychnine.
谋杀案中使用的毒药被鉴定为士的宁。
The dog died after eating rat poison containing strychnine.
这只狗吃了含有士的宁的老鼠药后死了。
In the old days, farmers used strychnine to control pests.
在过去，农民用士的宁来控制害虫。
The symptoms of strychnine poisoning include muscle spasms and convulsions.
士的宁中毒的症状包括肌肉痉挛和抽搐。
Strychnine is a powerful neurotoxin that affects the central nervous system.
士的宁是一种影响中枢神经系统的强效神经毒素。
The use of strychnine in sports has been banned due to its dangerous effects.
由于其危险的副作用，体育运动中已禁止使用士的宁。
Detectives found traces of strychnine in the victim's stomach.
侦探在受害者的胃里发现了士的宁的痕迹。
Strychnine is so potent that even a small dose can be lethal.
士的宁的毒性如此之强，即使是很小的剂量也可能致命。
In literature, strychnine has often been used as a plot element in murder mysteries.
在文学作品中，士的宁常被用作谋杀悬疑故事的情节元素。