coordinate covalent bond

coordination covalent bond

covalent bond cross-link

Covalent Bond Grafting

Covalent bond of dye molecule

covalent bond order

covalent bond self-assembly

Covalent-bond

Dynamic covalent bond

fullerene sulfur-bridge bond covalent linked tetrathiafulvalene derivative

non covalent bond

Non-Covalent Bond

non-covalent-bond

polar covalent bond

covalent coordination bond

co-existing of lithium bond and hydrogen bond

connected bond， unblocked bond

lloyd’s average bond {standard form of average bond}

average covalent factor