Oss
abbr. [美]航天科学局（Office of Space Sciences）；[美]战略情报局（Office of Strategic Services）
🗣️ 情景例句
Keep your chin up.
别灰心。
Yes, she's free then.
可以，她那时有空。
Education in the wilderness is not a matter of monetary means.
荒凉地区的教育不是钱的问题，