hydrogen-bond breaking region
co-existing of lithium bond and hydrogen bond
connected bond， unblocked bond
lloyd’s average bond {standard form of average bond}
along coastal region border region
Arid region and semiarid region
Bachu Region of Xin jiang Autonomous Region
Electric power transmission from western region to eastern region
gas conduction from western region to eastern region
infra-black region (blacker than black region)
10-membered ring hydrogen bond
13-membered ring hydrogen bond
1H detected heteronuclear multiple bond correlatio
5-center 2-electron bond
5-membered ring hydrogen bond
7-membered ring hydrogen bond