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Cucurbituril is a macrocyclic cavitand compound with two portals.是什么意思？

Cucurbituril is a macrocyclic cavitand compound with two portals.

葫芦脲是一种具有大环空腔、两端开口的葫芦状分子.

相关词汇
is macrocyclic compound with two portals

is

vt.& vi. 是（be的三单形式；n. 存在；

macrocyclic

adj. 大环的；

compound

n. 场地，复合物，（筑有围墙的）院子，复合词；

with

prep. 和，跟，随着，关于，和…一致；

two

n. 两个，两个东西，两点钟，一对；adj. 两个的，我

portals

n. 入口( portal的名词复数 )，桥门，[解剖学]肝门，出孔；
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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。
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一份耕耘，一份收获。
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