Ballista
n. 发射石块的古代武器
🗣️ 情景例句
They rescheduled the product launch.
他们重定产品投放市场的时间表。
I worked at the drugstore last night.
我昨晚在药房工作。
Sometimes we aren't able to get into every building because there are too many steps.
有时我们并不能进每栋楼房，是因为楼梯太多了。