Smac
abbr. Space Maintenance Analysis Centre 航天维护分析中心
🗣️ 情景例句
Fruit is good or your health.
水果有益健康。
There may be some quantity difference when loading the goods, but not more than 5%.
货物装船时可能会有一些数量出入，但不会超过5%。
Practice dialogues like these.
这样练习口语。