例句與造句

1. Phytoene is a symmetric molecule containing three conjugated double bonds.
2. Tetrahedral ( abbreviated Td ) molecules are highly symmetric molecules that belong the Td symmetry group.
3. They are derived from d, l-tartaric acid, an inexpensive C 2-symmetric molecule.
4. For very symmetric molecules, certain vibrations may be both infrared and Raman inactive ( within the harmonic approximation ).
5. So let's say I have some electronegative substituent, X . So let's have a symmetric molecule X-R2-R1-CH2-R1-R2-X . Would the central carbon be in fact less positive than it would be if it were H3C-R1-R2-X?
6. It's difficult to find symmetric molecule in a sentence. 用symmetric molecule造句挺難的