Defoliant: Chemical dust or spray applied to plants to cause their leaves to drop off prematurely.是什么意思？

Defoliant: Chemical dust or spray applied to plants to cause their leaves to drop off prematurely.

落葉劑: 落葉劑是一種化學(xué)粉劑或噴灑劑,施于植物以使樹葉提早掉落.

defoliant

n. <美>脫葉劑，落葉劑；

例句
The crash had spilled a noxious defoliant into the planet's ecology, ravaging the native flora.
這次墜毀將一種有害的落葉劑灑入星球的生態(tài)系統(tǒng)中, 破壞著當(dāng)?shù)氐闹参锶?

chemical

adj. 化學(xué)的，用化學(xué)方法制造的，化學(xué)作用的；n. 化學(xué)藥品，化學(xué)制品；

例句
The chemical companies had amalgamated into a vast conglomerate...
那些化學(xué)品公司已經(jīng)合并成一個龐大的企業(yè)集團(tuán)。

dust

n. 灰塵，（建筑物內(nèi)、家具或地板等上的）灰塵，遺骸，尸體，人體，人，〈口〉金粉，粉末，粉劑，花粉；vt.& vi. 拂（一拂），撣（一撣）；vt. 撒（粉）于，擦去…的灰塵，擦灰，撢去；

例句
Under the coating of dust and cobwebs, he discovered a fine French Louis XVI clock.
在一層灰塵和蜘蛛網(wǎng)底下，他發(fā)現(xiàn)了一座精美的法國路易十六時期的時鐘。

or

conj. 或，或者，還是，不然，否則，左右；prep. <古、詩>在…之前，比…更早；n. [紋章]黑金色、黑色；

例句
We are scared to abandon ourselves to our feelings in case we seem weak or out of control.
我們不敢放縱自己的情感，以免顯得太過軟弱或缺乏自制。

spray

vt.& vi. 噴，噴射；n. 噴霧，噴霧器，浪花，（用作裝飾的）小樹枝；

例句
The nasal spray was new on the market and highly efficacious.
這種鼻腔噴霧劑是新上市的，非常有效。

applied

adj. （尤指某種科學(xué)）應(yīng)用的，實用的；v. 應(yīng)用( apply的過去式和過去分詞 )，[apply oneself]使（自己）致力于，[apply oneself]使從事于，使接觸；

例句
The techniques are being applied almost everywhere by big and small firms alike.
無論在大公司還是小公司，這些技術(shù)的應(yīng)用幾乎無處不在。

to

prep. 向，朝著，到，關(guān)于，屬于；adv. 朝一個方向的，到某種狀態(tài)，關(guān)閉；

例句
I suggest you leave it to an expert...
我建議你把它留給專家來解決。

Plants

n. (plural form of plant,plant的復(fù)數(shù)形式)植物，農(nóng)作物，植物( plant的名詞復(fù)數(shù) )，工廠，發(fā)電廠，幼苗；v. 種植( plant的第三人稱單數(shù) )，建立，移植（動物、植物），在（某處）栽種；

例句
You are not allowed to bring plants in from further afield without a licence.
未經(jīng)許可不得從外地帶入植物。

cause

n. 原因，動機(jī)，理由，事業(yè)；vt. 成為…的原因，導(dǎo)致，引起，使遭受；

例句
Poor posture can cause neck ache, headaches and breathing problems.
姿勢不當(dāng)會導(dǎo)致頸部疼痛、頭痛和呼吸困難。

their

pron. 他（她，它）們的，在提及性別不詳?shù)娜藭r，用以代替 him 或 her；

例句
Their permissiveness toward their children reflects the wild abandon of their own lives.
他們對孩子的放任折射出他們自身生活的放浪形骸。

leaves

n. 樹葉，花瓣，(leaf的復(fù)數(shù))，頁( leaf的名詞復(fù)數(shù) )，葉子，有…狀葉的，金屬薄片；v. 離開( leave的第三人稱單數(shù) )，遺棄，忘了帶，交托；

例句
The leaves taste rather bitter.
這些葉子味道相當(dāng)苦。

drop

vt.& vi. （使）落下，投下，（使）降低，減少；vt. 放棄，停止，（故意）降下，垂下（眼睛）；n. 滴，空投，降落，少量；vi. （水或其他液體）滴，結(jié)束，（因受傷或死等）倒下，退出；

例句
Night temperatures can drop below 15 degrees Celsius...
夜間氣溫會降到15攝氏度以下。

off

prep. 從…落下，離開，從…去掉，下班；adv. 離開，距，離，被取消，下班；adj. 不新鮮的，不能接受，不禮

例句
He eased his foot off the accelerator.
他松開了油門。

prematurely

adv. 過早地，貿(mào)然地；

例句
Jud and Fred Brasser were both prematurely balding men in their early thirties.
賈德和弗雷德·布拉塞爾兩人才三十多歲就過早地謝了頂.

...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。

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(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(quán)當(dāng)有支付義務(wù)的第一方不能支付時，可以向商業(yè)票據(jù)的背書人要求支付的權(quán)力。

...an office in downtown Chicago.
位于芝加哥市中心的辦事處

Palace has released two marvellous films that pay homage to our literary heritage...
皇宮影業(yè)公司發(fā)行了兩部頌揚(yáng)我們文學(xué)遺產(chǎn)的精彩影片。

At some time or other Eve had obviously put the fear of God into her.
顯然伊芙時不時有意嚇唬她一下。

The albumin fraction of plasma protein is of the greatest significance.
血漿蛋白的白蛋白部分意義最大.

At present, are two shock absorption measures of tunnel, namely shock absorption layer and aseismatic joint.
目前隧道的減震措施主要有兩種, 即設(shè)置減震層和抗震縫.

It has the very important fluence to the vehicle normal use and service life.
銷軸是42號車車架上的重要組成部分,對整車的正常使用和使用壽命都有很重要的影響.

This is a minor point, but it must not be overlooked.
此事雖小, 然亦不可忽視.

The thief expressed penitence for all his past actions.
那盜賊對他犯過的一切罪惡表示懺悔.

He's a real Dorian Gray, apparently untouched by the ageing process.
他像是不受衰老過程的影響，青春永駐。