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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；
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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。
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风头鹦鹉[雪球]酷爱[新好男孩].
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Does infection of coccus of golden yellow grape have cured opportunity now?
金黄色葡萄球菌感染现在有治愈的机会 吗 ?
The cocoanut is particular to the tropics.
椰子是热带特有的.
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。
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一只凤头鹦鹉从繁育者那里购买应该有一对完整的爪子.
They also introduced me to Tera Thomas, friend, coauthor, and editor of Bringers of the Dawn.
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“ 我们可以看到了, ” 皮匠说.
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由于越来越难以收回成本，可可产业日渐衰落。
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椰子树原产于马来西亚。
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你这只臭蟑螂还挺强硬顶住了我的冲击波.
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把以前的衣服随便搭配一下就能拼凑出一套。
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含有染料的涂层用水洗10秒钟.
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这个出价,很可能是无烟燃料集团所难以拒绝的.