Stdiostream
标准输入输出流
🗣️ 情景例句
John cannot get to the phone right now.
John现在没办法接电话。
What's your wholesale price on this item?
这种产品你们的批发价是多少呢？
Yes, the economy model is about 30% less.
是的，经济型的大约便宜30%。