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效力最差的是金霉素 、 土霉素和四环素.用英语怎么说？

效力最差的是金霉素 、 土霉素和四环素.

Least effective were chlortetracycline, oxytetracycline, and tetracycline.

相关词汇
least effective were chlortetracycline and

least

pron. 最小的，最少的，程度最轻的；adv. 最少，最小；

effective

adj. 有效的，起作用的，实际的，实在的，给人深刻印象；n. [军]现役兵额，有生力量，精兵；

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；

chlortetracycline

n. 氯四环素；

and

conj. 和，与，而且，于是，然后，因此；
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。
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Taking p chlorotoluene as raw material , 2,4 Dichlorotoluene was synthesized via catalytic chlorination process.
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It was soon replaced by chloroform.
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The invention discloses a catalytic purification method of chlorobenzene waste gas.
本发明公开了一种氯苯废气催化净化方法.