这种细菌在抗生素环境下会迅速变异。
The bacteria quickly ___mutate when exposed to antibiotics.
经过几个月的训练,他的体型发生了彻底的变化。
After months of training, his body shape completely ___mutated.
病毒在传播过程中不断变异。
The virus ___mutates rapidly during transmission.