Definition: straight up or vertical Level: B2
请将您的座位恢复到直立位置并系好安全带。
Please return your seats to an ___upright position and fasten your seat belts.
飞行员指示我们系好安全带并将座位调直。
The pilot instructed us to fasten our seatbelts and put the seats ___upright.
尽管风很大，他仍然站得笔直。
He stood ___upright despite the strong wind.
