invariant delta-function
基本释义
不变δ函数
实用场景例句
日常对话
The lodger complained to the landlord about the noisy neighbors.
寄宿者向房东抱怨邻居太吵。
校园生活
The lodger in the dormitory room was always quiet and kept to himself.
宿舍里的寄宿者总是沉默寡言，喜欢独处。
职场沟通
The lodger shared an apartment with a colleague, saving on rent.
寄宿者与同事合租公寓，节省了房租。
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