Letter of insurance
[经] 保险信
🧩 词语组成解析
letter
['lɛtɚ]
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;
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
🗣️ 情景例句
It's time I was off.
我该走了。
She is a reliable assistant.
她是个可信赖的助手。
Where's Mr. Williams this evening?
威廉斯先生今晚去哪儿了？