英语：Module 5《Great People and Great Inventions of Ancient China》学案-Reading（外研版必修3）

1. Ancient China was a place where states were often at war with each other.

古代中国各诸侯国之间经常发生战争.

at war with 和……处于战争状态, “at +不带冠词的名词” 表示“从事某工作”或 “ 处于某种状态”, 如:

He is at work. === He is working.

The family are at breakfast ==== The family are having breakfast.

He is at rest in the bed. ==== He is resting in the bed.

类似表达有:

at dinner /at lunch /at play

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