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Freckles are simply concentrations of melanin.是什么意思？

Freckles are simply concentrations of melanin.

雀斑不过是高浓度的黑色素.

相关词汇
freckles are simply concentrations of melanin

freckles

n. 雀斑，斑点( freckle的名词复数 )；
例句
...her freckles and unmanageable hair.
她的雀斑和乱糟糟的头发

are

vi. （用于第二人称单复数现在时，第一、三人称复数现在时）是；n. 公亩（等于100平方米）；
例句
We are scared to abandon ourselves to our feelings in case we seem weak or out of control.
我们不敢放纵自己的情感，以免显得太过软弱或缺乏自制。

simply

adv. 简单地，朴素地，（引出概括或解释）不过，仅仅，简直，<非正>实在；
例句
Many parents simply abdicate all responsibility for their children.
许多父母对孩子简直是完全撒手不管。

concentrations

n. 集中( concentration的名词复数 )，专心，关注，浓度；
例句
The area has one of the world's greatest concentrations of wildlife...
这个地区是世界上野生动物最为密集的区域之一。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；
例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

melanin

n. 黑色素；
例句
The production of melanin in the skin is stimulated by exposure to the sun...
皮肤暴露在阳光下就很容易生成黑色素。
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
The trees on the mountains within my range of vision had all been felled.
山上我视野范围内的树木都被砍倒了。
She is a perfect incarnation of glamour.
她是魅力的完美化身。
She moves with the natural grace of a ballerina.
她的动作具有芭蕾舞演员自然优雅的丰姿。
Then I'll go down south to see the great changes in South China.
然后去中国南方看看那里的变化.
Where the consignor violates the previous paragraph, the carrier may refuse to carry.
托运人违反前款规定的, 承运人可以拒绝运输.
His gesture indicated a caution.
他的手势表示警告。
These two previously isolated species coalesced because of some large climatic change.
两个以前相隔离的种因为某种大的气候变迁而接合在一起.
Yes, I did read about it in the prospectus you sent me about the section.
对了, 在你们寄给我的质检科规划书中我读到过.
Some people link Mary to the Holy Grail and the Knights Templar.
一些人就把玛丽亚和圣杯与圣骑士连接在一起.
Main Application: Various equipment for derricking, lifting and drawing.
重要用途: 各种起重 、 提升和牵引设备及重要机械和仪器等.