dog watch千万不要翻译成“狗在看”，而是值夜班；半轮值更；两小时轮班制。
【例句】
John often has dog watches.
John经常上夜班。
A nurse has to return to duty at 10 o'clock in the evening and work until midnight, similar to the dog watch in the mercantile marine.
一名护士必须在晚上10 点钟返回值班，工作到午夜，类似于海洋航行中的值夜班。
【例句】
John often has dog watches.
John经常上夜班。
A nurse has to return to duty at 10 o'clock in the evening and work until midnight, similar to the dog watch in the mercantile marine.
一名护士必须在晚上10 点钟返回值班，工作到午夜，类似于海洋航行中的值夜班。
