slackened
用法要点
句型搭配
slackened 常用于被动语态或作为及物动词的过去式，描述动作完成后的状态，如 "The rope slackened" 或 "He slackened his grip"。
介词用法
slackened 常与介词 "off" 连用，表示逐渐减弱或放松，如 "The rain slackened off in the afternoon"。
语域说明
slackened 在正式和非正式语境中均可使用，但在学术或商务写作中更常见，描述物理松弛、速度减缓或努力松懈。
基础例句
After the storm passed, the wind slackened and the sun came out.
风暴过后，风势减弱，太阳出来了。
He slackened his grip on the handlebars as he coasted down the hill.
他下坡滑行时，放松了对车把的握力。
The teacher noticed that the students' attention slackened after lunch.
老师注意到学生们午饭后注意力变得松懈了。
She slackened her pace when she saw the bus approaching the stop.
看到公交车快到站时，她放慢了脚步。
高级例句
Economic growth slackened in the second quarter due to reduced consumer spending.
由于消费者支出减少，第二季度的经济增长放缓了。
The research team slackened their efforts after the initial breakthrough, leading to delays.
研究团队在初步突破后松懈了努力，导致了延误。
Regulatory enforcement slackened during the transition period, causing compliance issues.
在过渡期间，监管执法变得松懈，引发了合规问题。
The company's market expansion slackened as competition intensified in key regions.
随着关键区域竞争加剧，公司的市场扩张速度放慢了。
高频搭配
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常见错误
slackened 本身已表示松弛动作，不应直接与 "off the tension" 搭配；正确用法是描述 slackened 导致的结果，如用分词短语或从句。
slackened 表示放松或减缓，不能接不定式表示目的；应使用介词短语如 "in his work efforts" 来描述松懈的方面。
近义词辨析
loosened
loosened 更强调物理上的松开或放宽，如松开结或螺丝；slackened 则更广泛，可指速度、努力或紧张度的减弱。
He loosened the knot (物理松开) vs. The traffic slackened after rush hour (速度减缓)。
slowed
slowed 主要描述速度的降低，是更直接的近义词；slackened 除了速度，还可指努力、压力或强度的减弱，语义更丰富。
The car slowed down (速度减慢) vs. His enthusiasm slackened over time (热情减弱)。