1
a bel is equal to [number] decibels
A bel is equal to ten decibels.
一贝等于十分贝。
贝
bels — plural of bel
先理解核心含义，再看它在真实句子里的用法。
贝
a logarithmic unit of sound intensity equal to 10 decibels
A bel is equal to ten decibels.
一贝等于十分贝。
相对功率的度量单位,定义为log10(P1/P2),其中P1和P2分别为测量功率和参考功率。
A measure of relative power, defined as log10(P 1/P 2), where P1 and P2 are the measured and reference power respectively.
The difference between the two recordings was exactly one bel.
这两段录音的响度差恰好是一贝。
According to the chart, the signal dropped by two bels.
根据图表，信号下降了二贝。
One bel represents a tenfold increase in sound energy.
一贝表示声能增加到原来的十倍。
A bel is equal to ten decibels.
一贝等于十分贝。
bels 是 bel 的复数形式。
We measure sound intensity in bels.
我们用贝来测量声强。
Not this
A difference of one bell is equal to ten decibels.
Use this
A difference of one bel is equal to ten decibels.
贝耳（响度单位）拼作 bel，不是表示“铃铛”的 bell。写下单位名词时要删去多出的字母 l。
Not this
The machine measured a noise of two bel.
Use this
The machine measured a noise of two bels.
bel 是可数单位名词，复数须加 -s；汉语没有复数变化，所以容易漏掉。two bels 表示两个贝耳（即 20 分贝）。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
贝尔标度
The bel scale is rarely used because the decibel is more practical.
贝尔标度很少使用，因为分贝更实用。
十贝
A sound level of ten bels is equal to one hundred decibels.
十贝的音强等于一百分贝。
彼勒神
The Babylonians worshipped the god Bel.
巴比伦人崇拜彼勒神。
巴比伦的彼勒
Bel of Babylon was one of the supreme gods.
巴比伦的彼勒是至高神之一。
彼勒屈身，尼波弯腰。
In Isaiah 46:1, the prophet pictures the Babylonian gods Bel and Nebo bowing down, unable to protect their worshipers.
在《以赛亚书》46:1中，先知描绘巴比伦神明彼勒和尼波屈身弯腰，无法保护敬拜他们的人。
Use bels naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把bel联想成Bell（贝尔）：电话发明人贝尔，响度单位bel正是以他命名，1 bel=10分贝。
语域：formal 常见场景：acoustics、telecommunications、audio engineering bel 是贝（响度单位）的正式技术用语，通常出现在声学、电信等专业文献中；日常口语中很少单独使用。
作响度单位“贝”解时为可数名词，复数形式为 bels；作巴比伦神祇名 Bel 解时通常不用复数。
Dictionary facts from ECDICT, WIKTIONARY.