crotyl

例句：

1. 1. The researchers found that the crotyl in the vaccine could prevent the disease.
   研究人员发现疫苗中的肉毒杆菌毒素可以预防这种疾病。
2. 2. The doctor administered a small dose of crotyl to treat her patient's pain.
   医生给病人注射了一小剂量的肉毒杆菌毒素来治疗她的疼痛。
3. 3. Crotyl is a potent neurotoxin that can cause severe muscle paralysis.
   肉毒杆菌毒素是一种强烈的神经毒素，可以导致严重的肌肉麻痹。