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biological

adj. 生物學(xué)的，生物的，與生物學(xué)相關(guān)的，有血親關(guān)系的；n. [藥]生物制品，生物制劑；

systems

n. [物理化學(xué)]系( system的名詞復(fù)數(shù) )，制度，身體，系統(tǒng)；

have

aux. 用以構(gòu)成完成式及完成式的不定式，表示已經(jīng)…；vt. 有，具有，拿，取得，從事，必須，不得不；n. 〈口〉有產(chǎn)者，有錢人，富國(guó)，〈英俚〉欺騙，詐騙；

been

v. 用來(lái)表示某人或某物即主語(yǔ)本身，用來(lái)表示某人或某物屬于某一群體或有某種性質(zhì)（ be的過(guò)去分詞），在，存在，不受干擾，去過(guò)了，be的過(guò)去分詞；

doing

n. 做，不能接受，難以完成，事件；v. 做( do的現(xiàn)在分詞 )，干，學(xué)習(xí)，研究；

this

pron. 這，這個(gè)，這事，這人，這時(shí)，下面所說(shuō)的事；adj. 這，這個(gè)，剛過(guò)去的，即將到來(lái)的，今…，本…；adv. 這樣地，就是這樣，這么地；

for

prep. 為，為了，傾向于，關(guān)于，當(dāng)作；conj. 因?yàn)椋捎冢?/span>

billions

n. 十億（billion的復(fù)數(shù)形式）；

of

prep. 關(guān)于，屬于…的，由…制成；aux. 助動(dòng)詞 [非標(biāo)準(zhǔn)用語(yǔ)、方言] =have [主用于虛擬語(yǔ)氣]；

years

n. 年( year的名詞復(fù)數(shù) )，年紀(jì)，一年的期間，某年級(jí)的學(xué)生；

...the spiralling vortex airflow that slows the plane.
使飛機(jī)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(lái)。

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(qǐng)致電414 3925,轉(zhuǎn)分機(jī)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?jiān)诤芏嗳丝磥?lái)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(huì)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(quán)當(dāng)有支付義務(wù)的第一方不能支付時(shí)，可以向商業(yè)票據(jù)的背書人要求支付的權(quán)力。

Some basic problems and biogenesis on natural products research were analysed.
分析了天然產(chǎn)物研究中的基本問(wèn)題和生源研究.

Computers operate using binary numbers.
計(jì)算機(jī)運(yùn)行運(yùn)用二進(jìn)位制.

It'should be either approximately normal, bimodal, or skewed distribution.
它表現(xiàn)為近子態(tài)的, 雙態(tài)的或者偏態(tài)的分布.

The pain of biliary colic is occasionally in the epigastrium.
膽絞痛的疼痛有時(shí)出現(xiàn)在上腹.

As we all know , GuoYu is a masterpiece of biographically historic literature about Pre - Qin period.
《國(guó)語(yǔ)》是先秦時(shí)期一部史傳文學(xué)名著.

Western medicine thinks all diseases can be abnormality of bioelectricity of body.
所有疾病都是人體經(jīng)絡(luò)不通.

Mr Bing's office sits high above Detroit's barren streets.
Bing先生的辦公室位于底特律空蕩蕩的街道的上面.

An experimental investigation on purification of ethylbenzene waste gas a biofilter packed with ceramic pellets.
以陶粒作為生物過(guò)濾床的填料凈化含乙苯廢氣.

The preferred compositions are the highly nitroplasticized nitrocellulose binder compositions.
較好的配方是那些高硝基增塑的硝化棉粘合劑配方.

The BOD test is essentially a bioassay procedure.
BOD試驗(yàn)實(shí)際上是一項(xiàng)生物測(cè)定方法.

The waiter returned with their order and Graham signed the bill.
侍者把他們點(diǎn)的餐端了過(guò)來(lái)，格雷厄姆簽了單。

Objective To investigate the toxicology and biodynamics of silica nanoparticle.
目的:研究硅顆粒制成納米顆粒后的長(zhǎng)期毒性及生殖毒性.

Microbial reactions play key roles in biocatalysis and biodegradation.
在生物催化和生物降解中微生物反應(yīng)起了關(guān)鍵的作用.

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Biological systems have been doing this for billions of years.是什么意思？

Biological systems have been doing this for billions of years.

生物系統(tǒng)億萬(wàn)年來(lái)一直都是這樣。