Resonance theory says that benzene can be represented by two contributors.是什么意思？

Resonance theory says that benzene can be represented by two contributors.

共振论认为苯能用两个参与体表示.

resonance

n. 共鸣，反响，共振；

例句
The resonance scattering spectra of colibacillus have been studied.
研究了大肠杆菌的共振散射光谱.

theory

n. 学说，理论，原理，推测；

例句
...a theory that is steadily gaining acceptance...
逐步得到承认的理论

says

v. 说，讲(say的第三人称单数)；

例句
'When I was an adolescent,' says a thirty-one-year-old man, 'I thought girls held all the aces.'
“当我还是个毛头小伙儿时，”一个31岁的男人说，“我觉得完全是女孩子说了算。”

that

det. 那个，那；pron. 那个，那；conj. 多么，如此…以至，用于某些动词、形容词和名词后，引出各种从句；adv. 不那么，那样；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

benzene

n. 苯；

例句
The benzene vaporized and formed a huge cloud of gas...
苯蒸发了,形成了一大团气体。

can

aux. 能够，可以，有机会；n. 金属罐，一听，金属容器；vt. 将…装罐保存，炒…鱿

例句
When I listen to her play I can hear a new Nigel Kennedy.
从她的演奏中我听出了新一代的奈杰尔·肯尼迪。

be

v. 是，有，存在，做，成为，发生；aux. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质；

例句
The older child should be able to prepare a simple meal...
那个年纪稍大的孩子应当会做一顿简单的饭菜。

represented

v. 表现( represent的过去式和过去分词 )，代表，体现，作为…的代表；

例句
Ari Hart recently received the accolade of being represented in the Museum of Modern Art.
阿里·哈特的作品最近有幸获选在现代艺术馆展出。

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

two

n. 两个，两个东西，两点钟，一对；adj. 两个的，我

例句
He has been absent from his desk for two weeks...
他已经有两个星期没有坐在办公桌前了。

contributors

n. 捐款人( contributor的名词复数 )，捐助人，促成因素，投稿者；

例句
Large public and private companies have long been contributors to Tory party coffers.
长期以来，大型的上市公司和私营企业一直在为保守党捐助资金。