通牒的英文：
diplomatic note

参考例句：

It was not long before the captain received from the Cossack leader a manifesto ordering him to surender.
不久上尉便接到这位哥萨克首领要他投降的通牒。

Since the ultimatum is never delivered,I have no opportunity to read it.
因为这个最後通牒始终未下达，所以我没有机会读到它。

diplomatic是什么意思：
adj. 外交的，从事外交的；有外交手腕的；圆滑的

The lady is a diplomat.
那位女士是个善于交际的人。

a permanent diplomatic mission
常驻外交使团

Cowperwood was always so diplomatic.
柯帕乌一向是很有外交手腕的。

Her mother is a ranking diplomat.
她妈妈是高级外交官。

The diplomatic corps will come here.
外交使节团会来这儿。

note是什么意思：
n. 便条；照会；记录；注释；纸币；音符；调子；票据
v. 注意（到）；强调指出；记录

a note of protest
抗议照会

This is the tonic note.
这是主音音符。

The unstressed note or notes introductory to a phrase or composition.
轻音符介绍乐曲或作品的未加强的一个或多个音符

The greatest difference was noted in extension.
伸展测试的差异是最显著的。

To note how the diction describes.
注意词藻怎样起描述作用的。