plummet 基本解释
vi. 垂直落下；骤然跌落
n. 铅锤；坠子；重压物
plummet 网络释义
n. [测] 铅锤，坠子vi. 垂直落下；（价格、水平等）骤然下跌
plummet 词性变化
第三人称单数:plummets 过去式:plummetted 现在分词:plummeting 过去分词:plummeted
中文词源
plummet 暴跌，速降
来自古法语plomet,铅，铅球，来自plomb,铅，铅球，词源同plumb.-et,小词后缀。比喻用法。
词组短语
1、plummet level 定垂线尺
2、plummet instrument 直线下降仪器
3、optical plummet 光学垂准器；[测]光学对点器；光测悬锤
4、plummet plunge 直线下降
5、pickax cave plummet 鹤嘴锄洞直线下降
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