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do a thrash
She did a thrash to stay afloat.
她做了一个鞭状打水动作来保持漂浮。
击打；敲打声
先理解核心含义，再看它在真实句子里的用法。
击打；敲打声
a blow or beating; the sound of it
She did a thrash to stay afloat.
她做了一个鞭状打水动作来保持漂浮。
击打或敲击；敲击声。
A beat or blow; the sound of beating.
特别强劲的柴油发动机的轰鸣声和烟雾。
The roar and smoke of a particularly powerful diesel engine.
The steady thrash of the waves against the pier was the only sound at dawn.
黎明时分，海浪持续拍打码头的声响是唯一的声音。
She could hear the thrash of the old washing machine from the next room.
她在隔壁房间能听到旧洗衣机发出的撞击声。
He was woken by the thrash of branches hitting the window in the storm.
暴风雨中，树枝敲打窗户的声音把他吵醒了。
She did a thrash to stay afloat.
她做了一个鞭状打水动作来保持漂浮。
He used the thrash to conserve energy while treading water.
他在踩水时使用鞭状打水动作来节省体力。
Not this
Our team thrashed theirs in the match.
Use this
Our team beat theirs in the match.
thrash 强调用暴力痛打，用于体育比赛不合适；应使用 beat 表示在比赛中击败。
Not this
They thrashed about the problem for hours.
Use this
They thrashed out the problem for hours.
thrash about 意为‘乱动、辗转’，thrash out 才是‘彻底讨论、解决’的意思；介词搭配错误导致语义混淆。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
做一个鞭状打水动作
She learned to do a thrash while treading water.
她学会了在踩水时做一个鞭状打水。
鞭状打水
The thrash is essential for efficient treading water.
鞭状打水对于高效踩水至关重要。
鞭状打水动作
He practiced the thrash motion to improve his water treading.
他练习鞭状打水动作以提高踩水能力。
彻底讨论（以达成一致）
We need to sit down and thrash out the details of the contract.
我们需要坐下来彻底讨论合同的细节。
（剧烈地）扭动；挣扎
The fish thrashed around on the deck.
鱼在甲板上剧烈地扭动。
痛打；狠揍
The bully threatened to thrash the living daylights out of him.
那个恶霸威胁要把他狠揍一顿。
Use thrash naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
想象踩水时双腿像鞭子一样猛烈抽打水面，thrash就是这种鞭状打水动作。
语域：neutral 常见场景：swimming、water safety 该义项在游泳技术指导或水上安全教学中较为常见，属于中性语域，既可用于正式教学也可日常交流。
可数名词
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.