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遗传密码在上一代确实很少有人知道.用英语怎么说？

遗传密码在上一代确实很少有人知道.

A generation ago genetic codes were certainly unknown.

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
That , of course, is just the sort of cockiness that rankles with health pundits.
当然, 这也正是让健康专家们耿耿于怀的某种趾高气扬.
Dangerous undertows make swimming unsafe along most of the coastline.
由于存在着危险的下层逆流，在大部分海岸线附近游泳都不安全。
Mock not a cobbler for his black thumbs.
莫笑皮匠拇指黑.
He is too bloody cocksure about everything.
他对于每一件事都过于自信.
Cockle the paper to make a flower.
把纸弄得起绉做花.
All bit rates must use the same video codec.
所有比特率必须使用相同的视频编解码器.
He recognized the coast of England through a veil of mist.
透过薄雾他认出了那是英格兰的海岸线。
" Now we shall see,'said the cobbler.
“ 我们可以看到了, ” 皮匠说.
The ground was covered with cocoanut trees and papayers.
地上长满了椰子树和木瓜树.
Countermeasures: replacement of water resistance , or join a envirogluvtm anti - moisture cocatalyst.
对策: 更换抗水性好的油墨, 或加入抗水助剂.
A cobbler passed his time in singing from morning till night.
皮匠从早到晚不停地唱歌.
The visiting professor was cocktailed, partied and dined.
为来访的教授举行了鸡尾酒会 、 晚会和晚宴.
Cockerel a well - thought - out plan , ask: " How to run? "
小公鸡 胸有成竹, 问: “ 怎么跑? ”
The whole system's plane includes system of DSP, FLASH storage, audio CODEC and USB communication, etc.
整个系统的硬件平台包括DSP核心模块 、 FLASH存储器 、 音频CODEC、USB通信等模块.