Srsd
abbr. Space and Re-entry Systems Division 航天与再入系统处
🗣️ 情景例句
Well, I know you and Mom have given up a lot
嗯， 我知道你和妈妈省吃俭用
My sister has been engaged for two months.
我的姐姐订婚有2个月的时间了
This echo-location in bats is often compared with radar, the principle of which is similar.
蝙蝠这种回声定位常常可与雷达相比较，其原理是相似的。