third class
参考词典中third class的常规释义：
基本释义
- n. 三等,三级
英英解释
2个名词解释
- mail consisting of printed matter qualifying for reduced postal rates
[同] third class, third-class mail - inexpensive accommodations on a ship or train
[同] third class, tourist class
点击查看……- mail consisting of printed matter qualifying for reduced postal rates
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