Polyerg
[医] 多能血清(单种血清而作用于异种抗原)
🗣️ 情景例句
I never slept.
我总睡不着。
It is too late to shut the stalbe door when the steed is stolen.
失马锁厩，为时已晚；贼去关门，为时已迟。
It is the one world in the Solar System that is most like the Earth.
火星是太阳系里与地球最接近的一颗行星。