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Herons Ardeidae, sparrows ( Passerinae ) and common magpies ( Corvidae ) are suggested as useful bioindicators of environmental pollution.是什么意思？

Herons Ardeidae, sparrows ( Passerinae ) and common magpies ( Corvidae ) are suggested as useful bioindicators of environmental pollution.

建议选择野生鹭类、麻雀和喜鹊等鸟类作为指示生物监测环境中的重金属污染.

herons

n. <动>鹭( heron的名词复数 )；

例句
Lying in bed we often see dark shapes of herons silhouetted against the moon.
躺在床上,我们常看到月光映衬下鹭的黑色身影。

Ardeidae

n. 鹭科；

sparrows

n. 麻雀( sparrow的名词复数 )；

例句
It was winter and the sparrows were pecking at whatever they could find...
时值冬季，麻雀啄食着能够找到的任何东西。

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

common

adj. 普通的，通俗的，[数学]公共的，共有的；n. [法律]（对土地、水域的）共有权，公共用地，普通，平民；

例句
The pharmacist can assist you with the treatment of common ailments.
药剂师能帮你治疗一般的病痛。

magpies

n. 喜鹊（magpie的复数形式）；

例句
Herons Ardeidae, sparrows ( Passerinae ) and common magpies ( Corvidae ) are suggested as useful bioindicators of environmental pollution.
建议选择野生鹭类、麻雀和喜鹊等鸟类作为指示生物监测环境中的重金属污染.

are

vi. （用于第二人称单复数现在时，第一、三人称复数现在时）是；n. 公亩（等于100平方米）；

例句
We are scared to abandon ourselves to our feelings in case we seem weak or out of control.
我们不敢放纵自己的情感，以免显得太过软弱或缺乏自制。

suggested

adj. 暗示的；v. 建议( suggest的过去式和过去分词 )，暗示，使想起，启示；

例句
I have never suggested that UN forces could physically separate the combatants in the region...
我从未暗示过联合国部队实际上能够将该地区各参战方隔离开。

as

adv. 同样地，一样地，例如；prep. 作为，以…的身份，如

例句
As far as I can recall, Patti was a Smith.
我记得帕蒂是姓史密斯的。

useful

adj. 有用的，有益的，有帮助的，令人满意的；

例句
A tripod will be useful to align and steady the camera...
三脚架有助于调准和稳定相机。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

environmental

adj. （个人）环境的，由个人环境产生的，周围的，环境艺术的；

例句
He has attempted to align the Socialists with the environmental movement.
他已试图争取社会党人支持环境运动。

pollution

n. 污染（作用），腐败，堕落，沾污；

例句
The air pollution exceeds most acceptable levels by 10 times or more.
大气污染程度超出了普遍认可的标准10倍或更多。

...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。

This decree obliges unions to delay strikes.
该法令迫使工会推迟罢工。

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

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。

Supporters of the death penalty argue that it would deter criminals from carrying guns...
死刑的支持者认为它能阻吓罪犯携带枪支。