a rounder for [task]
He bought a rounder for cutting corners on the wooden board.
他买了一个修圆角工具用来切割木板的边角。
修圆角的工具
巡行者，看夜人，巡官；(非正式)浪荡子，惯犯，酒鬼；巡回传教的卫理公会牧师,也称为巡回骑士；在圆形机车库操作转盘的铁路工人。；以打牌为生的人。
a tool for rounding corners or edges
巡回传教的卫理公会牧师,也称为巡回骑士
A Methodist preacher traveling a circuit, also referred to as a circuit rider.
在圆形机车库操作转盘的铁路工人。
A railroad man who worked at a roundhouse, operating the turntable.
以打牌为生的人。
A person who earns a living by playing cards
流连于酒吧、沙龙等场所的人；比喻指放荡者或浪荡子。
A person who makes the rounds of bars, saloons, and similar establishments; figuratively, a debaucher or roué
进行环绕的人；经常或定期出现的人。
One who rounds; one who comes about frequently or regularly.
用于使边缘或表面变圆的工具。
A tool for making an edge or surface round.
Use the rounder to smooth the sharp edges of the wooden block.
用修圆角工具来磨平木块的锋利边缘。
用法提示：rounder作名词，指修圆角的工具，句中作宾语。
A rounder is essential for creating consistent curves on metal sheets.
修圆角工具对于在金属板上创建一致的曲线至关重要。
用法提示：rounder作主语，指用于金属加工的工具。
He bought a rounder from the hardware store to finish the cabinet corners.
他从五金店买了一个修圆角工具来完成橱柜角落的修整。
用法提示：rounder作宾语，指购买的工具。
He bought a rounder for cutting corners on the wooden board.
他买了一个修圆角工具用来切割木板的边角。
The factory employs a night rounder to check the premises.
工厂雇用了一名夜班巡官检查场地。
grammar · medium
易错句子He rounder the edges with a file.
正确表达He rounded the edges with a file.
“rounder”是名词，意为“修圆角的工具”或“巡行者”等，而“round”才是动词“使变圆”。中文学习者常误加“-er”将其用作动词。
grammar · medium
易错句子He is a rounder man.
正确表达He is a rounder.
“rounder”本身就是名词，表示“浪荡子”或“惯犯”等，不能用作形容词修饰名词。中文学习者受形容词用法影响，易错误地将名词前加形容词结构。
rounded 是形容词，描述形状圆润的状态；而 rounder 是名词，指修圆角的工具，不可互换。
round 作动词时表示‘使变圆’的动作；rounder 是名词，指实现该动作的工具，不能用作动词。
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