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a shark's dorsal fin是什么意思？

a shark's dorsal fin

鲨鱼的背鳍

相关词汇
dorsal fin

dorsal

adj. 背的， 脊的，背部的，背面的；
例句
...a dolphin's dorsal fin.
海豚的背鳍

fin

n. 鱼鳍，鳍状物，（汽车、飞机、炸弹上的）尾翅，散热片；vt. 给…装上翅片，切除鳍；vi. 潜泳，（猛烈地）拍动（鳍）；
例句
The caudal fin crooked shape, on the leaf is specially developed.
尾鳍歪形, 上叶特别发达.
热门例句
He acknowledged publicly that he might have made a mistake.
他当众承认自己可能犯了个错误。
...the spiralling vortex airflow that slows the plane.
使飞机减速的螺旋形气流涡旋
You just go on ahead. I'll come by later...
你只管先往前走。我随后就来。
He who spares his rod hates his son, But he who loves him chastens him early.
24不忍用杖打儿子的,是恨恶他;疼爱儿子的, 趁早管教.
For further information, please contact 414 3925, extension 2253.
详情请致电414 3925,转分机2253。
He sat there while I made the case for his dismissal...
他坐在那儿，听我陈述解雇他的理由。
Baroness Thatcher's claims seem credible to many.
撒切尔女男爵的主张在很多人看来是可信的。
Nothing to be got without pains but poverty.
一份耕耘，一份收获。
This decree obliges unions to delay strikes.
该法令迫使工会推迟罢工。
The right to demand payment from the endorser of a commercial paper when the first party liable fails to pay.
追索权当有支付义务的第一方不能支付时，可以向商业票据的背书人要求支付的权力。
相关例句
Erosive action is achieved at each contraction where a pair of opposing vanes are installed.
在每个收缩区段中相对地设置一对叶片,都起到了冲洗作用.
Two and three added together are five.
2加3等于5。
He appeared to be angry, spitting out disconnected words.
他看起来很生气，嘴里愤愤地说着一些毫无条理的话。
...'Smash Hits', a teenage magazine.
青少年杂志《流行金曲》
When heterothallism is purely physiological, morphologically identical strains exist ( often designated plus and minus strains ).
当异宗配合纯粹是生理上时, 存在形态上相同的菌系 ( 经常用+—号表示 ).
Patients are typically kept at modified bedrest and frequently assessed for evidence of infection or labor.
嘱患者取相应姿势绝对卧床休息,严密观察其感染征象及产程进展.
These three converters are all pure oxygen top - blow .
这三座转炉都是纯氧 顶吹 的.
The lack of childcare provisions made it difficult for single mothers to get jobs...
由于缺乏保育服务，单身母亲很难找到工作。
The two kinds are open end investment company and closed - end investment company.
这种公司分为两类,即开放型投资公司和 封闭型 投资公司.
Companies should protect employees who blow the whistle on dishonest workmates and work practices.
公司应该保护那些检举不诚实的工友及工作行为的员工。