If something is dear to you or dear to your heart, you care deeply about it.
宝贵的; 珍视的 • This is a subject very dear to the hearts of academics up and down the country.
You can call someone dear as a sign of affection.
亲爱的 • You're a lot like me, dear. 你和我太像了,亲爱的。
"Oh dear, oh dear." McKinnon sighed. "You, too." “
啊,天哪,”麦金农叹息道,“你也一样。”