Blackbox
n. 黑箱
🗣️ 情景例句
My father sends his regards to you.
我父亲向你问好。
This alone made our nine-day trip worthwhile.
光这件事我们9天的旅行就非常值得。
Though the sound could be heard clearly, it took me a long time to react.
虽然声音听得很清楚，但我过了好一会儿才作出反应。