Colibacterin
大肠菌苗
🗣️ 情景例句
if you skip it now.
假如你现在略过它的话。
You look tired. Have you been getting enough sleep?
你似乎累了。睡眠充足吗？
Suppose every sensor gives perfectly accurate readings of temperature,
再假定每个传感器都极端准确地读出了温度、