High-value vocabulary
该词属于 Oxford 核心词汇，值得优先掌握常见搭配和句型。
直径减小；变细
先理解核心含义，再看它在真实句子里的用法。
直径减小；变细
to decrease in diameter
When heated, the glass tube necks in the middle before it breaks.
加热时，玻璃管在中部变细，然后断裂。
直径减小
To decrease in diameter.
neck
Base
原形
necks
3rd person
第三人称单数
necking
-ing
现在分词
necked
Past
过去式
necked
Past participle
过去分词
The pipe necks when heated.
管子受热时变细。
The metal necked under the pressure.
金属在压力下变细了。
The rod has necked to half its original width.
这根棒已变细到原来宽度的一半。
作动词时表示“直径变细”，常用于工程或制造语境。
The cable had necked where it rubbed against the sharp edge, so we replaced it.
电缆在摩擦锋利边缘的地方变细了，所以我们把它换掉了。
Keep pulling the wire slowly, and you will see it neck just before it snaps.
继续慢慢拉这根金属丝，你会看到它在断开前先变细。
Choose the next layer that will help you use neck with more confidence.
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该词属于 Oxford 核心词汇，值得优先掌握常见搭配和句型。
Collins 词频等级为 3，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 DICTIONARY_API_DEV, ECDICT, WIKTIONARY.