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(organic chemistry) Fischer projection
The Fischer projection is a commonly used representation method in organic chemistry.
(organic chemistry) Haworth projection
In organic chemistry, we use the Haworth projection to represent the three-dimensional structure of sugars.
(organic chemistry) Natta projection
In the organic chemistry class, there was an explanation of the Natta projection.
a bird in the hand is worth two in the bush
He chose a stable job, saying 'a bird in the hand is worth two in the bush.'
single transferable vote
The single transferable vote is an important means to ensure the fairness of elections.
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