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a pedometer is a device that + verb
这个句型常用来解释计步器是什么。
A pedometer is a device that records the number of steps you walk.
计步器是一种记录你行走步数的设备。
计步器；步数计
先理解核心含义，再看它在真实句子里的用法。
计步器；步数计
an instrument for recording the number of steps taken when walking
A pedometer is a device that records the number of steps you walk.
计步器是一种记录你行走步数的设备。
计步器；测量步数并估算行走距离的设备。
A device, often electronic, that measures the number of steps taken, and thus estimates the distance walked.
记录步行步数的测量仪器
measuring instrument for recording the number of steps taken in walking
I wear a pedometer on my belt to count how many steps I take each day.
我把计步器别在腰带上，记录我每天走多少步。
At the end of the walk, she checked her pedometer and saw that she had walked more than ten thousand steps.
散步结束时，她查看了计步器，发现自己走了一万多步。
He bought a simple pedometer to motivate himself to exercise more.
他买了一个简单的计步器，激励自己多锻炼。
这个句型常用来解释计步器是什么。
A pedometer is a device that records the number of steps you walk.
计步器是一种记录你行走步数的设备。
被动语态 be used to do 表示“被用来做某事”。
Pedometers are used to track the number of steps you take.
计步器用于记录你走的步数。
以计步器作主语时，常用 show/record 等动词引出读数。
My pedometer shows that I walked 8,000 steps today.
我的计步器显示我今天走了8000步。
Not this
I have two pedometer.
Use this
I have two pedometers.
pedometer 是可数名词，复数形式为 pedometers。汉语“两个计步器”没有复数标记，所以容易漏掉 -s。
Not this
I pedometer my steps every day.
Use this
I count my steps with a pedometer every day.
pedometer 是名词（计步器），不能当动词用。应改为动词 count，并用 with a pedometer 表示“用计步器”。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
佩戴计步器
She wears a pedometer every day to track her steps.
她每天佩戴计步器来记录步数。
计步器读数
His pedometer reading showed that he had walked ten thousand steps.
他的计步器读数显示他走了一万步。
电子计步器
A digital pedometer can store your daily step counts.
电子计步器可以储存你每天的步数。
用计步器记录步数
I track my steps with a pedometer during my morning run.
我晨跑时用计步器记录步数。
计步器应用
This pedometer app is free and easy to use.
这款计步器应用免费且易于使用。
计步器数据
The pedometer data showed a steady increase in daily activity.
计步器数据显示日常活动量稳步增加。
Use pedometer naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把ped联想成脚（像pedal踏板），ometer联想成测量器，脚测量步数，就是计步器。
语域：neutral 常见场景：日常步行与健身、健康监测 该词为中性词，日常和较正式场合都可用；多用于健身、健康监测等场景，通常指随身携带的计步设备。
与 pedometer 押韵（英式读音，重读元音 /ɒ/ 后接 /mɪtə/）的有 odometer、thermometer、barometer、speedometer。注意 diameter 和 perimeter 拼写也以 -meter 结尾，但重读元音分别为 /æ/ 和 /ɪ/，发音不同。
Dictionary facts from ECDICT, WIKTIONARY.