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plunge verb | noun
 1 
plunge / plQndV ; plQndV /verb
1. I,T always + adv / prepto move, fall, or be thrown suddenly forwards or downwards（使）突然向前倒下（跌落）:
[+ off / into etc ]
•Her car swerved and plunged off the cliff.她的车突然转向冲下了悬崖。
•Both the climbers had plunged to their deaths .两位攀登者都坠地身亡。
2. Iif a price, rate etc plunges, it suddenly decreases by a large amount〔价格、比率等〕暴跌，骤降:
•The unemployment rate plunged sharply.失业率骤降。
[+ to ]
•Oil prices have plunged to a new low .石油价格创了新低。
•In the recession, the company's profits plunged 60%.萧条时期，那家公司的利润骤跌了 60%。
3. Iliteraryif a ship plunges, it moves violently up and down because of big waves〔船〕猛烈地颠簸
 PHRASAL VERBS 
plunge in also plunge into sth
1. to start talking or doing something quickly and confidently, especially without thinking about it first贸然行动:
•It's a difficult situation. You can't just plunge in and put everything right.情况棘手，不是贸然行动就解决得了的。
•'I don't agree,' she said, plunging into the conversation.“我不同意，”她突然加入了谈话。
2. to jump or DIVE into water跳进〔水中〕:
•He stripped off and plunged into the sea.他脱光衣服跳入海中。
3. plunge sth ↔ in also plunge sth into sth to push something firmly and deeply into something else把某物投（插，刺）入某物中:
•He opened the bag and plunged his hand in.他打开包把手伸了进去。
•Plunge the pasta into boiling water.把意大利面倒入沸水中。
•Repeatedly she plunged the knife into his chest.她一刀刀插入他的胸口。
plunge (sb / sth) into sthphr v
1. to suddenly experience a difficult or unpleasant situation, or to make someone or something do this（使某人/某物）陷入（遭受）某种情况:
•A strike would plunge the country into chaos.罢工会让国家陷入混乱。
•The house was suddenly plunged into darkness .房子一下子陷入黑暗之中。
•After the war, the family plunged into debt.战后，这家人债台高筑。
 2 
plungenoun
1. take the plunge to decide to do something important or risky, especially after thinking about it for a long time〔尤指经过长时间思考之后〕决定奋力一搏，决定冒险一试:
•We took the plunge and set up our own business.我们毅然决定开创自己的事业。
2. Ca sudden large decrease in the price, value etc of something骤降:
[+ in ]
•a dramatic plunge in house prices房价的暴跌
3. C usually singulara sudden movement down or forwards突降; 俯冲:
•The plane began a headlong plunge towards the Earth.飞机开始向地面俯冲。
4. C usually singularwhen someone suddenly becomes involved in something new突然卷入:
[+ into ]
•his sudden plunge into marriage他的闪电结婚
5. C usually singulara jump or DIVE into water, or a quick swim跳水;〔短时间的〕游泳:
[+ in / into ]
•a quick plunge in the lake在湖中游一小会儿泳

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