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
thrashes — plural of thrash
（大功率柴油机的）轰鸣与烟雾；击打或敲击；敲击声。；特别强劲的柴油发动机的轰鸣声和烟雾。；打谷；(划水)鞭状动作
a blow or beating; the sound of it
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。
用法提示：thrash 为名词，意为敲打声，此处与 of 连用作主语。
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。
用法提示：thrash 为名词，表示机械发出的撞击声，作 hear 的宾语。
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。
用法提示：thrash 为名词，指树枝拍打的声响，用于介词 by 之后。
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。
比 thrash 更常用；特指水球等运动中使用的踩水踢腿动作。
grammar · medium
易错句子Our team thrashed theirs in the match.
正确表达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。
grammar · medium
易错句子They thrashed about the problem for hours.
正确表达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。
thresh是动词，thrash作名词时表示打谷的过程或游泳的鞭状动作，两者拼写仅差一个字母，发音相同，但词性不同，用法也不同。
trash和thrash发音相近，拼写相似，但意思完全不同。thrash作为名词多指打谷或游泳动作。
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。
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.