一个原子失掉一个电子来形成一个正离子，另一个原子得到一个电子来形成一个负离子的化学键。
A chemical bond in which one atom loses an electron to form a positive ion and the other atom gains to electron to form a negative ion.
原子获得了电子导致了负离子的形成。
The gain of electrons by an atom leads to the formation of a negative ion.
结果表明，这个类肽能很好地识别卤素负离子，并与其形成1∶1的络合物。
The result showed that 1 binds well with the halide anions, and forms 1:1 stoichiometric complexes.
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