Circumvallation
n. 围以城墙
✅ 同义词
🗣️ 情景例句
Do you have any coupons?
你们有优惠卡吗？
She bursts into laughter.
她突然笑出声来。
Early next morning, she heard planes passing overhead and wondered how she could send a signal.
第二天一大早，她听到头顶上有飞机飞过，但不知道怎样才能发个信号。