例句與造句

1. The second one, 1 ( also at 1.17 eV ), is an open-shell radical with a D 3h-symmetric equilibrium between three equal geometries; each has a longer C C bond ( 1.48 ?) and two shorter ones ( 1.38 ?), and is flat and bilaterally symmetric except that the longer methylene is twisted 79 degrees out of the plane ( C 2 symmetry ).
2. It's difficult to find shell radical in a sentence. 用shell radical造句挺難的