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concave lens是什么意思？

concave lens

凹透镜

相关词汇
concave lens

concave

n. 凹面，成凹形；adj. 凹的；vt. 使成凹形；

lens

n. 透镜，镜头，眼睛中的水晶体，隐形眼镜，汽车的灯玻璃；
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
a pay system of unnecessary complexity
过度复杂的付款系统
His eyes were strangely compelling.
他的眼睛有一种奇特的吸引力。
The man was mad, completely mad.
这个人疯了, 完全疯了。
He has a headache and isn’t feeling communicative today.
他今天头痛,不爱说话。
The case for greater nationalization is compelling.
主张进一步国有化的理由是令人信服的。
Don't commit your promises to paper if you are not certain you keep them.
如果你没有把握兑现你的许诺，你就不要做出书面保证。
The rash most commonly appears on the back.
皮疹经常长在后背上。
Only now did he understand the full complexity of the problem.
直到现在他才明白这一问题的全部复杂性。
I am prepared to make some concession on minor details, but I cannot compromise on fundamentals.
在一些细节上我可以作些让步，但在基本原则上我是不会妥协的。
Attendance at the meeting is compulsory.
会议是必须参加的。
I am developing a guilt complex about it.
我对此事有一种负罪感。
I’ve got complimentary tickets for the theatre.
我得到了戏院的赠票。
He was appointed United Nation High Commissioner for refugees.
他获任命为联合国难民事务高级专员。
Certain desires are common to all men.
某些欲望对所有的人是共有的。