Lemmas
n. 前题（助定理）
✅ 同义词
🗣️ 情景例句
to live with my son and his family.
和我儿子和他的家人住在一起。
We'll have to check these rates against those charged by other suppliers.
我们必须核查一下由其他供应商提供的费率。
What was it like?
那次地震怎么样？