It is the letter not sent that is often the most valuable.
📚 名句词汇解析
从本句名言中提取的重要词汇，帮助你深度理解这句话
adj. 贵重的，宝贵的;有价值的;可评估的;
n. 贵重物品，财宝;
💡 valu=value价值+able形容词后缀→有价值的
"However, to my brother they are very valuable."
然而，对我弟弟来说，它们是很珍贵的。
近义：helpful, immeasurable, appreciated, inappreciable, inestimable, loved
反义：inexpensive, knockdown, downscale, downmarket, cheaply
n. 信;证书，许可证;字母，文字;字面意义;
vt. 用字母标明;写字母于;加标题;
vi. 写印刷体字母;
"a letter of accreditation"
一份合格证明书
近义：label, mark, docket, missive, note, epistle
adv. 常常;经常;时常;再三;
💡 十(ten)有八九的(of)， 经常的
"Sleep has often been thought of as being in some way analogous to death."
人们常常认为睡眠在某种意义上来说类似死亡。
近义：manyfold, oft, oftentimes, repeatedly, usually, offtimes
反义：infrequently, occasionally, seldom, sometimes