NOS

例句：

1. 1. The new model is not yet available for purchase.
   这款新型号目前还未上市。
2. 2. We need to keep the NOS in a safe place.
   我们需要把NOS放在安全的地方。
3. 3. The NOS is responsible for monitoring traffic flow.
   NOS负责监控交通流量。