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A typical lens has a focal length ( f ) of 625 mm.是什么意思？

A typical lens has a focal length ( f ) of 625 mm.

常见镜头的焦距 ( f ) 为625毫米.

相关词汇
typical lens has focal length of mm

typical

adj. 典型的，特有的或特别的，代表性的；
例句
The typical laborer now sits in front of a bank of dials.
现如今，工人通常都是坐在一排仪表前。

lens

n. 透镜，镜头，眼睛中的水晶体，隐形眼镜，汽车的灯玻璃；
例句
The camera has a 32mm lens with a maximum aperture of f/4.5 and a fixed shutter speed of 1/100sec.
这架相机有一个32毫米的镜头，最大孔径为f/4.5，固定快门速度为1/100秒。

has

v. 有( have的第三人称单数 )，（亲属关系中）接受，拿，买到；
例句
...the operation a patient has had.
病人做过的手术

focal

adj. 焦点的，有焦点的，集中在点上的，病灶的，病灶性的；
例句
...the focal plane of the telescope.
望远镜的焦平面

length

n. 长度，长，时间的长短，（语）音长，一段，一节；
例句
It is against the law to detain you against your will for any length of time...
无论强制扣押多长时间都属违法。

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。

mm

abbr. =megameter，=millimeter，=millimicron；
例句
Riyadh got 25 mm of rain in just 12 hours...
利雅得在12小时内降水就达25毫米。
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
He also very frequently filled the post of head godfather in baptisms of the subtly - jovial kind.
他也经常在那种微妙快活的洗礼中充当首席教父.
A feeling of utter helplessness washed over him.
一种全然无助的感觉涌上他的心头.
He was asleep there, curled up in the fetal position.
他像胎儿一样蜷曲地睡在那儿。
Descartes'rational intuition has brought durative effect to whole philosophy later.
笛卡尔的理性直观对唯理论和经验论乃至后来整个哲学的发展都产生了持续的影响作用.
They are supposed to provide insurance against default to bondholders.
它们理应向债券持有人提供违约风险保险.
hold/keep/leave in abeyance
搁置起来，暂时搁置，暂不实施，中止
Skeptics raise other concerns , ones that go beyond the copycat effect.
怀疑论者提出了其他思考挑战copycat效应.
inequitable distribution of wealth
财富的不公平分配
Earlier, it had been hoped to use the indoor track.
之前曾经希望能使用室内跑道。
Yorkshire is still very much a farming community with good meat, good dairy produce and eggs...
约克郡在很大程度上仍以农业为主，出产优质肉类、奶制品和蛋类。