Tos
abbr. 磁带作业系统（Tape Operating System）
🗣️ 情景例句
but now what?
但下一步怎么办？
It is not good to make a sleeping lion.
弄醒睡狮不是好事。
I have 4 books and 2 magazines to check out.
我有4本书和2本杂志要借。