A one- man operation that still believes that you can tell a lot about a person by the way they wear their hat.
一个人的操作仍然相信你可以通过他们戴帽子的方式来了解一个人。
英语百科
One-man operation
One-man operation (OMO), also known as driver-only operation (DOO), one person operation (OPO), single person train operation (SPTO), or one-person train operation (OPTO), is operation of a train, bus, or tram by the driver or motorman alone, without a conductor.