Ostmarks
(ostmark 的复数) n. 民主德国马克(前东德的货币单位)
🗣️ 情景例句
Easy now. Easy does it. That's it.
放轻 ，不要紧 ，对了。
Evil communications corrupt good manners.
交往恶劣，有损风度。
a wave length (the horizontal distance between two wave crests),
波长（两个浪峰间的水平距离）