Ssr
abbr. 苏维埃社会主义共和国（Soviet Socialist Republic）；二次监视雷达（Secondary Surveillance Radar）；小型潜艇反应堆（Small Submarine Reactor）
🗣️ 情景例句
Those were great days and we were very happy.
那些日子美好极了，我们过得很幸福。
Do I have to reserve a seat?
我一定要预订座位吗？
He has eight lawyer assistants to help him and examines every single letter in detail.
他有8位律师作他的助手协助工作，每封信都详细批阅。