Koi
n. 锦鲤（观赏鱼）
🗣️ 情景例句
That's very nice of you.
你真是太好了。
While there is life, there is hope.
留着青山在，不怕没柴烧。
Sometimes the secrecy goes to such an extent that the whole nature of the research cannot be mentioned.
有时，保密竟达到了这样的程度，即连研究工作的整个性质都不准提及。