bandwidth
bandwidth — 名詞
1. how much digital data a computer network, internet connection, or phone line can
頻寬
網路或線路每秒可傳輸的資料量
how much digital data a computer network, internet connection, or phone line can carry from one place to another in a given second.
Vesna's home internet has enough bandwidth to stream three movies at the same time.
Vesna 家裡的網路頻寬足以同時觀看三部電影。
subject + has + enough/high/low bandwidth
The office Wi-Fi slowed down because too many laptops were sharing the same bandwidth.
辦公室 Wi-Fi 變慢了，因為太多筆電一起共用同一條頻寬。
sharing/limited bandwidth in shared networks
Video calls eat up far more bandwidth than simple email or text messages.
視訊通話比一般的電子郵件或文字訊息更耗網路頻寬。
The school upgraded its internet last summer to get higher bandwidth for online classes.
學校去年夏天升級了網路，為線上課程取得更高的頻寬。
Omar checked the router settings to see why his bandwidth had dropped so suddenly.
Omar 檢查了路由器設定，想知道頻寬為什麼突然下降。
- throughput
more technical; the actual rate achieved, not the maximum the line allows
- data capacity
broader; covers storage as well as transfer
文法句型
high/low + bandwidth
用法筆記
Almost always uncountable. Often paired with adjectives like 'high', 'low', 'limited', 'enough', or with a measurement (e.g. '100 megabits of bandwidth').
常見錯誤
2. the time, energy, or focus a person has left for taking on extra tasks, problems
心力；餘裕
處理額外事情的時間或精神餘裕
the time, energy, or focus a person has left for taking on extra tasks, problems, or feelings — used as a casual way to talk about personal limits.
Sorry, I don't have the bandwidth to plan another fundraiser this month.
抱歉，我這個月實在沒有心力再籌辦另一場募款活動。
have (the) bandwidth + to-infinitive
After finals week, Eitan had no emotional bandwidth left for family arguments.
期末考週結束後，Eitan 已經沒有心力再應付家裡的爭吵。
emotional / mental + bandwidth
Una asked if his manager had the bandwidth to review the report before Friday.
Una 問主管週五前是否有餘裕審閱這份報告。
New parents often lack the bandwidth to keep up with old hobbies.
新手爸媽經常沒有心力繼續從前的興趣。
Our small team simply doesn't have the bandwidth to take on three new clients.
我們小團隊真的沒有餘裕一次接下三個新客戶。
文法句型
have + (the) bandwidth + to-infinitive
用法筆記
Common in workplace and self-care contexts. Distinguish from sense 1 (computing): here the subject is a person or team, and the object of effort is a task or feeling, not data.
常見錯誤
3. the whole stretch of frequencies a signal or device occupies — described as a ra
頻帶範圍
訊號佔用的整段頻率區間（含上下界）
the whole stretch of frequencies a signal or device occupies — described as a range with a lower and upper limit, named so engineers know where on the dial it lives.
Each radio station is given a small bandwidth so signals do not overlap.
每家廣播電台都分配到一小段頻帶範圍，避免訊號重疊。
given / assigned + bandwidth
Engineers at JAXA measured the bandwidth of the satellite link before the rocket launch.
JAXA 的工程師在火箭發射前測量了衛星連線的頻帶範圍。
measure the bandwidth of + system
Dr. Nadia adjusted the antenna so its bandwidth covered both the 88 and 108 megahertz limits.
Dr. Nadia 調整天線，讓頻帶範圍同時涵蓋 88 和 108 兆赫的上下限。
The hospital's new MRI scanner operates within a bandwidth that runs from about 60 to 70 megahertz.
醫院新的 MRI 掃描儀運作的頻帶範圍大約落在 60 到 70 兆赫之間。
- frequency range
plainer everyday phrase for the same idea
- spectrum
broader; can refer to all possible frequencies, not just the slice in use
用法筆記
Technical sense used in physics and telecommunications. Distinguish from sense 4: this sense names which slice of the spectrum is in use (defined by its lower and upper edges); sense 4 names a single number — how many Hz the slice measures across.
4. in radio, a single number that says how wide one waveband is — the gap in hertz
頻道寬度
單一頻道寬度的數值（赫茲）
in radio, a single number that says how wide one waveband is — the gap in hertz between its lowest and highest frequencies.
An FM channel usually has a bandwidth of two hundred kilohertz.
一個 FM 頻道的頻道寬度通常是兩百千赫。
bandwidth of + numeric value (channel width)
Older television channels had a bandwidth of six megahertz in the United States.
美國早期的電視頻道寬度是六百萬赫。
When the BBC doubled the bandwidth of its trial digital channel, listeners reported much sharper sound.
BBC 把試播數位頻道的頻道寬度加倍後，聽眾反映音質明顯更清晰。
Una's amateur radio licence caps the bandwidth at three kilohertz for single-sideband voice transmissions.
Una 的業餘無線電執照規定，單邊帶語音傳輸的頻道寬度上限為三千赫。
- channel width
everyday equivalent in broadcasting talk
用法筆記
Mostly seen in broadcasting and radio engineering writing. The number-with-units shape ('a bandwidth of X kHz') is the giveaway for this sense. Sense 3 names the range itself (the slice of spectrum); sense 4 reduces that slice to a single width measurement.