Nist
[计] 美国国家标准及技术研究所
🗣️ 情景例句
Good morning.
早安。
The history paper was really easy, so was the biology one.
历史试题确实容易，生物试题也很容易。
I have just heard from my sister, Mary.
我刚收到我妹妹玛丽的一封信。