我最珍贵的东西用英语怎么说

"My most precious thing" 用英语表达为 "my most treasured possession" 或 "my most valued possession"。
其中 "treasured" 和 "valued" 都表示 "非常珍贵" 的意思，而 "possession" 是指你拥有的东西。
例句：
My grandmother's wedding ring is my most treasured possession. (我奶奶的婚戒是我最珍贵的东西。)
That old teddy bear has been my most valued possession since I was a child. (那只老泰迪熊是我小时候最珍贵的东西。)