例句與造句

1. In the early 1990s, theoretical studies and electron diffraction analysis of the 3D structure of the molecule, in the gas phase or in non-polar solvents, indicated that the bonds between the nitrogen atom and the three carbon atoms were nearly coplanar in the ground state, instead of forming a trigonal pyramid as in simpler amines.
2. It's difficult to find electron diffraction analysis in a sentence. 用electron diffraction analysis造句挺難的