1
the second-hand on [a clock/watch]
作名词时指钟表上指示秒数的指针，通常用单数并带定冠词 the。
The second-hand on this clock is red.
这个钟的秒针是红色的。
秒针
second-hands — plural of second-hand
先理解核心含义，再看它在真实句子里的用法。
秒针
the hand on a clock or watch that marks the seconds
The second-hand on this clock is red.
这个钟的秒针是红色的。
She waited until the second-hand reached twelve before starting the stopwatch.
她一直等到秒针指向十二，才启动秒表。
The second-hand on the kitchen clock makes a soft clicking sound.
厨房钟的秒针发出轻柔的滴答声。
I couldn't see the second-hand clearly in the dark.
在黑暗中我看不清秒针。
作名词时指钟表上指示秒数的指针，通常用单数并带定冠词 the。
The second-hand on this clock is red.
这个钟的秒针是红色的。
watch 在这里是及物动词，后面直接跟秒针作宾语。
Watch the second-hand while I count to ten.
我数到十的时候，你看着秒针。
Not this
The clock has second-hand.
Use this
The clock has a second-hand.
second-hand（秒针）是可数名词，单数可数名词前通常需要加 a 或 the；中文没有冠词，所以容易遗漏。
Not this
The second needle is broken.
Use this
The second-hand is broken.
中文“秒针”里的“针”直译成 needle，但英语钟表上表示“指针”的词是 hand，所以“秒针”要说 second-hand。
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常与of连用表示所属关系。
Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from AI_FALLBACK, DICTIONARY_API_DEV, ECDICT.