1
be/look/feel wan
作形容词时，指脸色苍白或缺乏血色，常与系动词连用。
After the long flight, he looked wan and exhausted.
长途飞行后，他看起来苍白而疲惫。
广域网
先理解核心含义，再看它在真实句子里的用法。
广域网
a computer network that spans a wider area than does a local area network
After the long flight, he looked wan and exhausted.
长途飞行后，他看起来苍白而疲惫。
苍白；病态苍白
The quality of being wan; wanness.
覆盖范围比局域网更广的计算机网络
a computer network that spans a wider area than does a local area network
The company uses a WAN to connect its offices in different cities.
这家公司使用广域网连接不同城市的办公室。
A WAN can link several local networks across long distances.
广域网可以将多个本地网络跨越长距离连接起来。
They installed new equipment to make the WAN faster and more reliable.
他们安装了新设备，让广域网更快、更可靠。
作形容词时，指脸色苍白或缺乏血色，常与系动词连用。
After the long flight, he looked wan and exhausted.
长途飞行后，他看起来苍白而疲惫。
动词意为“（使）变苍白”，较少用；过去式和过去分词均为 wanned。
Her face wanned with fear when she heard the news.
听到这个消息时，她的脸因恐惧而变得苍白。
此义项是 wide area network（广域网）的缩写，通常写作 WAN，为可数名词。
The company connected its branches via a WAN.
这家公司通过广域网连接其分支机构。
Not this
He looked wanned after the long flight.
Use this
He looked wan after the long flight.
looked 是系动词，后面应接形容词 wan（苍白的），不能接动词 wan 的过去分词 wanned。wanned 表示“使变苍白”的过去/被动意义，不能用来描述人的面色。
Not this
We need wan to connect our Shanghai and Beijing offices.
Use this
We need a wan to connect our Shanghai and Beijing offices.
wan 作名词表示“广域网”时是可数名词，单数形式前需要不定冠词 a；汉语没有冠词，容易遗漏。加上 a 后句子才完整。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
广域网连接
The office relies on a dedicated WAN connection for all its remote sites.
办公室的所有远程站点都依赖专用的广域网连接。
广域网链路
A leased line is often used as the primary WAN link.
租用线路通常被用作主要的广域网链路。
广域网优化
WAN optimization can significantly reduce network latency for cloud applications.
广域网优化可以显著降低云应用程序的网络延迟。
广域网接口
Make sure the router's WAN interface is connected to the modem.
确保路由器的广域网接口已连接到调制解调器。
广域网流量
The IT team monitors WAN traffic to detect unusual activity.
IT团队监控广域网流量以检测异常活动。
Use WAN naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
WAN 是 Wide Area Network 的首字母缩写，联想：广域网覆盖广阔（wide）区域。
语域：neutral 常见场景：网络工程、IT基础设施、企业技术文档 作为名词，指广域网（WAN），是计算机网络领域的专业术语，通常出现在技术文档、网络配置或行业讨论中，在日常口语里用得较少，多写作全称 wide area network。
作“广域网”解时通常写作 WAN。
Dictionary facts from ECDICT, WIKTIONARY.