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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。
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。
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。
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
Coarctation of the lower thoracic aorta . [ comment ] .
缩窄下胸 主动脉.
Everyone coattails of Louis Vuitton's brand imaging in China.
每个人都想抓住LouisVuitton在大陆品牌形象的燕尾服效益.
The lower dislocation density in bainite is unfavourable for the aggregation and coarsening of carbides.
贝氏体中位错密度较低,不利于合金碳化物的聚集粗化.
The sonar reveals acres of cobblestone fields surrounding our craft.
声纳揭示出在我们潜水器的周围是一片几英亩大的鹅卵石地.
Soapy took a cobblestone and dashed it through the glass.
索比捡起一块鹅卵石,向玻璃窗砸去.
TV pictures showed a dying bird coated with oil.
电视画面上出现了一只身上沾满油污、奄奄一息的小鸟。
These tests clearly show in coater group drying, is of paramount importance.
这些测试清楚显示在涂布机组间的干燥, 极为重要.
All surfaces are provided with highly reflective coatings.
所有表面上均涂一层高反射膜.
Conclusion Radix panacis quinquefolii isn't evidence cochlea toxicity for guinea pig.
结论高丽参对豚鼠无明显的耳毒性作用.
This is some of the most exposed coastline in the world.
这里的海岸线属于世界上最无遮蔽的一段了。
A crowd quickly assembled to watch the cockfight.
人们立即聚集起来看斗鸡.
During the second world war he served with RAF Coastal Command.
二战期间他在英国皇家空军海防总队服役。
You cannot live in a cocoon and overlook these facts.
你不能自己缩在套子里而忽略这些事实。
Coca is well-known for reducing hunger, thirst and fatigue.
人们都知道可乐能消饿、止渴和解乏。