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A generation ago genetic codes were certainly unknown.是什么意思？

A generation ago genetic codes were certainly unknown.

遗传密码在上一代确实很少有人知道.

相关词汇
generation ago genetic codes were certainly unknown

generation

n. 一代人，代（约30年），时代，生殖，产生；

ago

adv. 以前，过去的，之前；

genetic

adj. 遗传的，基因的，起源的，起因的，演变的；

codes

n. [计算机]编码( code的名词复数 )，代号，密码，法典；

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

certainly

adv. 无疑，当然，确定，肯定；

unknown

adj. 未知的，不出名的，从未发生的，从不存在的；n. 不知名或不出名的人，未知的事物，<数>未知数，未知数；
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
If so, he would at any rate be able to deliver the cockchafer speech.
若是那样, 他无论如何也要把那一番骂人的话发泄出来.
They are spherical ( coccoid ) or form long microscopic filaments of individual cells.
通常是球状的 ( 球菌样的 ) 或长微纤丝的单个细胞.
You can cobble it together from any old combination of garments.
把以前的衣服随便搭配一下就能拼凑出一套。
Inspecting fitting accuracy of hatch coaming on board.
货舱口围板船上安装精度检查.
Nanhumycin, a new polyether antibiotic, has potent growth inhibitory effect on bacillus and against chicken coccidiosis.
南湖霉素具有抑制枯草杆菌生长和抗鸡球虫病效应,是个新的多醚类抗生素.
The oil washed ashore on roughly 1,000 miles of coastline.
石油沿着海岸线扩散到了大约1,000英里范围的沿岸海域。
The last few weeks have been a real roller coaster.
过去的几个星期，形势真是变幻莫测。
Objective To observe the acute toxicity and the anti - tumor effect of Niuhuangtianlong capsule.
目的了解牛黄天龙胶囊的急性毒性及其 抗肿瘤 作用.
The colors include satin , matt & cochineal colors.
粉调分为光影色 、 影色 和 胭脂色.
My opponent is riding the coattails of the popular governor of Massachusetts.
我的对手在依靠麻省德高望重的州长而占点便宜.
The cocoanut is particular to the tropics.
椰子是热带特有的.
Yeah. How about corn on the cob?
好的. 烤玉米怎么样?
Let's meet in the cocktail lounge at the Hilton.
我们在希尔顿酒店的酒吧间碰头吧。
There was not much elbow room in the cockpit of a Snipe.
“沙锥鸟”战斗机的驾驶舱空间不太宽敞。