Poliovaccine
嵴髓灰质炎疫苗
🗣️ 情景例句
When I was asked to speak in English.
刚才当被要求说英语的时候。
Congratulations on your having passed the test.
我恭喜你通过了考试。
Twenty or thirty pages of information handed to any of the major world powers around the year 1925 would have been sufficient to change the course of world history.
如果把二三十页的情报交给1952年前后的任何一个世界强国，就足以改变世界历史的进程。