Jcaa
abbr. Japanese Civil Aviation Authority 日本民用航空局
🗣️ 情景例句
Thank you.
谢谢 。
Please be serious for a minute, this is very important.
请严肃点，这件事很重要。
How ever you may work hard, the boss will not be fully satisfied.
无论你有多努力，老板总不会完全满意。