Regularities
n. 规则性( regularity的复数形式 ); 正规; 有规律的事物; 端正
🗣️ 情景例句
and wrote to his wife Martha.
给他妻子Martha写信。
Do you know when the next exam is?
你知道下次考试在什么时候吗？
Are your grandparents still living?
你的祖父母还在么？