Sasd
结构化分析和结构化设计
🗣️ 情景例句
I work part time in the summer to pay for my tuition.
我夏天做兼职来支付学费。
I'd like to know something about your foreign trade policy.
我非常想了解有关贵国对外贸易的政策。
But this hope is always in the realms of science fiction.
但是，这种希望总是只在科幻小说中存在。