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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
A cobbler passed his time in singing from morning till night.
皮匠从早到晚不停地唱歌.
The coda to this last movement is borrowed from two humanists.
这个最后乐章的完结部是引用两个人道主义者的话.
They also introduced me to Tera Thomas, friend, coauthor, and editor of Bringers of the Dawn.
他们也将我介绍给特拉?托马斯, 他是黎明的带来者朋友 、 合著者和编辑.
Suddenly a GREat cockchafer buzzed along . Alas!
突然一只很大的金龟子 嗡 嗡嗡飞过.
A two piece packing gland prevents cocking and stem damage.
两件式填料压盖防止压盖翘起和阀杆损坏.
Fundamentals of annealing, spinodal decomposition, nucleation, growth, and particle coarsening.
退火 、 旋节分解 、 成核 、 成长和颗粒粗化的基本原理.
the cocoon of a caring family
家庭中相互关爱所形成的保护
That gentleman disliked coarseness and profanity.
那位先生一向忌讳粗俗和猥亵.
Discouraging words for those who believe that a college's job is to educate, not coddle.
对于那些认为学校的职责是教育而非溺爱的人而言,这样的话实在让人气馁.
No amount of coaxing will make me change my mind.
任你费尽口舌也不会说服我改变主意。
This is called nesting or cocooning.
这就是所谓的筑巢或结茧.
You must be tough as a cockroach to survive my attack wave.
你这只臭蟑螂还挺强硬顶住了我的冲击波.
That painging's not hanging straight; it's cockeyed.
那幅油画没挂正, 挂歪了.
Doesn't that picture look cockeyed to you?
你不觉得那张画挂歪了吗？