您要查找的是不是：
- A substance that provides a pair of electrons for a covalent bond with an acid. 共价化合物能够提供一对电子给一个酸形成共价键的化合物
- An anion in which carbon carries a negative charge and an unshared pair of electrons. 负碳离子，阴碳离子一种阴离子，其中碳带一个负电荷和一个非共用电子对
- The bond in which the linkage pair of electrons are providedby one of the bonding atoms. 一个键合原子用以联结一对电子的键。
- I bought a pair of tan leather shoes the other day. 前几天我买了双棕褐色的皮鞋。
- Alkanes have only single covalent bonds, meaning that the bonds are formed by two carbon atoms sharing a pair of electrons. 链烷只有单一的共价键，这意味着共价键是由两个碳原子分享一对电子。
- Don't mix up this pair of synonyms. 别把这两个近义词混淆了。
- The determined absorption constant show HEDTMP canproduce & which can provide isolated pair of electron to coordinate with metallic ion. 测定了HEDTMP酸离解常数。 显示化合物在中性pH下能有效生成含孤对电子的氧负离子，提示化合物与金属离子可望生成稳定配合物。
- He wears an oily old pair of jeans. 他穿着一条沾满油污的旧牛仔裤。
- This pair of scales is not in equilibrium. 这个天平不平衡。
- This pair of trousers is too tight for me. 这条裤子我穿太紧了。
- She splashed out on a new pair of shoes. 她心血来潮买了一双新鞋。
- Billy has a pair of new trousers. 比利有一条新的裤子。
- Molecules orions which act a ligands should therefore have lone pairs of electrons for donation. 因此，作为配体的分子或离子有具有作给予用的孤电子对。
- A new pair of shoes wouldn't come amiss. 新鞋不会不称心的。
- This small animal has a pair of hazel eyes. 这只小动物有一双淡褐色的眼睛。
- Molecules or ions which act as ligands should therefore have lone pairs of electrons for donation. 作为配体的分子或离子应该有具有作给予用的孤电子对。
- Molecules or ions which act a ligands should therefore have lone pairs of electrons for donation. 作为配体的分子或离子应该有具有作给予用的孤电子对。
- He was dressed in a pair of black trousers. 他穿着一条黑色裤子。
- Alkynes have one or more triple bonds, the carbon atoms sharing three pairs of electrons. 链炔有一个或超过三个共价键，即碳原子享有三对电子。
