Undetectable
[ ['ʌndi'tektəbəl] ]
其它 Other
a. 无法觉察的, 无法发现的
🗣️ 情景例句
Don't worry, be happy.
别担心，开心点。
Sincerely hope that your visit here will be worthwhile and meaningful.
衷心希望您的来访有收获且意义深远。
It is used by travellers and business people all over the world.
在世界各地的旅行者及商人都用英语。