牛马[niú mǎ]
oxen and horses; beasts of burden:
例：当牛马
be a slave;
过着牛马不如的生活
live a life worse than that of beasts of burden
1. critter：critique 批评法 | critter 牛马 | critter 创造物
2. Beasts of burden：Donkeys 毛驴 | Beasts of burden牛马 | will carry for you会继续为您