例句與造句

1. An electrophilic substitution reaction on benzene does not always result in monosubstitution.
2. In a pioneering study by Frank C . Whitmore ethyltrichlorosilane ( " scheme 2 " ) was chlorinated by sulfuryl chloride as chlorine donor and benzoyl peroxide as radical initiator in a radical substitution resulting in chloride monosubstitution to some extent in the ?-position ( 28 %, due to steric hindrance of the silyl group ) and predominantly in the ?-position.
3. It's difficult to find monosubstitution in a sentence. 用monosubstitution造句挺難的