1.测锤(钓丝的)坠子;线锤;铅锤线;锤规;重压物
1.笔直掉下;骤然跌落
1.to fall straight down very quickly from a high position
2.if something such as an amount, rate, or value plummets, it suddenly becomes much lower
1.During the long gestation period for the rules, circulation came to be valued as a revenue source, while ad revenues were plummeting.
在漫长的孕育规则的过程中，发行量曾作为收入来源的指标，然而广告收入直线下降。
2.As if to prove the point, the China-Japan summit appears to have done nothing for Mr Fukuda's approval ratings, which are plummeting.
本次中日首脑会面似乎没有对福田正在直线下滑的支持率造成任何影响，这一现象恰好验证了这一观点。
3.A tremendous accomplishment would be if the planetary body he discovered were plummeting toward Earth and he exploded it with his mind.
巨大成就是指他发现的星体正坠向地球，而他用意念爆破掉它。
4.Plummeting water oxygen levels due to a severe drought have led to thousands of fish dying along the Manaquiri River.
由于严峻的干旱导致的马拉奎利河水中含氧量缺乏导致了河中数以千计的鱼死亡。
5.Prices have soared by as much as 60% over the last two years, after plummeting 40% at the beginning of the financial crisis.
金融危机开始时这里的房价暴跌40%，过去两年最高上涨了60%。
6.Some demographers, however, argue that plummeting fertility rates and a rapidly aging population are reasons enough to ease the rules.
一些人口统计专家却认为，如今急剧下降的出生率以及快速形成的老龄化社会是尽快叫停这项政策的原因。
7.Business investment, which had been plummeting in the past few months, is showing signs of stabilizing.
商业投资在经历了连续数月自由落体般的下坠后，开始企稳。
8.Toyota Motor is to reduce year-end bonuses for thousands of managers as part of a cost- cutting drive in response to plummeting sales.
丰田汽车（ToyotaMotor）计划减少数千名经理的年终奖，以此作为应对销售额暴跌的成本削减举措的一部分。
9.Oil producers are coping with the plummeting price of jet fuel as the result of a decrease in demand.
由于需求减少，石油生产商正在解决飞机燃油价格骤跌的问题。
10.Now an analysis of 17 years of research data shows that the abundance of these deep-sea fishes is plummeting.
据一份长达17年的研究分析数据报告显示，这些深海鱼类的数量正在呈现大幅减少之势。