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the

art. 指已提到的人（物），指說話人與聽者已知的人（物），用于獨一無二的事物前，與形容詞最高級和序數詞連用；

例句
He did have a real knowledge of the country...
他對該國的確知之甚多。

key

n. 鑰匙，（打字機等的）鍵，關鍵，線索，秘訣，（音樂的）調；vt. 鍵入，鎖上，調節…的音調，提供線索；vi. 使用鑰匙；adj. 關鍵的，主要的；

例句
Several key crops failed when they were attacked by pests.
一些主要農作物由于遭受蟲害而歉收。

step

n. 步，腳步，步驟，手段，步調，級別；vt.& vi. 舉步，行走，踩，踏上，跨入，輕快地走；vi. 踏，踩，走；vt. 跳舞，邁步，使成階梯狀；

例句
Getting into the aft cabin involves a slight step down from saloon level.
去后艙需要從餐廳的位置略微往下邁一小步。

was

v. 用來表示某人或某物即主語本身，用來表示某人或某物屬于某一群體或有某種性質（ be的過去式），在，存在，不受干擾；

例句
There was a terrible sadness in her eyes...
她眼神中流露出深深的悲傷。

substrate

n. 底物，底層，基底，基層；

例句
NiCrAlY coating was deposited on Ti 6 Al 4 V substrate by arc ion plating ( AIP ).
采用電弧離子鍍 ( AIP ) 技術在Ti6Al4V基體表面沉積制備了NiCrAlY涂層.

controlled

adj. 受約束的，克制的；v. 控制( control的過去式和過去分詞 )，管理，限制，克制；

例句
Exchange is largely controlled by big banks.
貨幣兌換業務主要由大銀行控制。

asymmetric

adj. 不對稱的，不勻稱的，<邏>非對稱的；

例句
We have made no reference to asymmetric carbon atoms.
我們未曾涉及不對稱碳原子.

heteroatom

n. 雜原子，雜環原子；

例句
The key step was a substrate controlled asymmetric heteroatom conjugated addition.
關鍵反應為底物控制的不對稱雜原子共軛加成反應.

conjugated

adj. 共軛的，成對的；v. 列出（動詞的）變化形式( conjugate的過去式和過去分詞 )，結合，聯合，熔化；

例句
Astaxanthin molecular structure which contains 13 conjugated double bonds, is one kind of extremely unsteady carotenoid.
蝦青素分子結構中含有13個共軛雙鍵, 是一種極不穩定的類胡蘿卜素.

addition

n. 加，增加，附加，[數]加法，增加的人或事物；

例句
There's a postage and packing fee in addition to the repair charge.
除修理費之外還有郵寄和包裝費。

...the spiralling vortex airflow that slows the plane.
使飛機減速的螺旋形氣流渦旋

You just go on ahead. I'll come by later...
你只管先往前走。我隨后就來。

He who spares his rod hates his son, But he who loves him chastens him early.
24不忍用杖打兒子的,是恨惡他;疼愛兒子的, 趁早管教.

For further information, please contact 414 3925, extension 2253.
詳情請致電414 3925,轉分機2253。

He sat there while I made the case for his dismissal...
他坐在那兒，聽我陳述解雇他的理由。

Baroness Thatcher's claims seem credible to many.
撒切爾女男爵的主張在很多人看來是可信的。

Nothing to be got without pains but poverty.
一份耕耘，一份收獲。

This decree obliges unions to delay strikes.
該法令迫使工會推遲罷工。

The right to demand payment from the endorser of a commercial paper when the first party liable fails to pay.
追索權當有支付義務的第一方不能支付時，可以向商業票據的背書人要求支付的權力。

"Right," she said, chuckling. "Thanks, anyway." "It was the least I could do".
“行啦，”她笑呵呵地說，“還是得謝謝你。”“不客氣”。

She spoke for the first time about the traumas of a broken marriage...
她首度談起婚姻破裂帶來的精神創傷。

Don't scold the child. It's not his fault.
別責怪那孩子, 那不是他的過錯.

There were also surprises in store for me...
也有一些令人吃驚的事在等著我。

As 2010 begins, Neptune is still in Aquarius and your eleventh house.
由于2010年開始, 海王星仍然在寶瓶座和你的第11宮.

There are many statuaries of our ancestors and Kings in the museums.
在博物館里,有許多我們祖先和先王的雕像.

...technological frontiers.
技術尖端

To get the most out of your money, you have to invest.
要想把錢的收益最大化，就必須投資。

Yes , I want two sharpeners , please.
我想買兩個卷筆刀.

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關鍵反應為底物控制的不對稱雜原子共軛加成反應.用英語怎么說？

關鍵反應為底物控制的不對稱雜原子共軛加成反應.

The key step was a substrate controlled asymmetric heteroatom conjugated addition.

the

key