例句與造句

1. Symmetric hydrogen bonds have been postulated in ice at high pressure ( Ice X ).
2. Symmetric hydrogen bonds have been observed recently spectroscopically in formic acid at high pressure ( > GPa ).
3. In the Zundel complex the proton is shared equally by two water molecules in a symmetric hydrogen bond.
4. It's difficult to find symmetric hydrogen bond in a sentence. 用symmetric hydrogen bond造句挺難的