1. Menstruation became late 10 days, went to a hospital yesterday urinalysis is
electronegative. Am I pregnant?
月经晚了10天，昨天去医院验尿是阴性。我是不是怀孕了啊？
2. Antigen of second liver surface why is somebody electropositive somebody be
electronegative? Which had been planted?
乙肝表面抗原为什么有人是阳性有人是阴性啊?哪种好呢?
3. A chemical bond in which a hydrogen atom of one molecule is attracted to an
electronegative atom, especially a nitrogen, oxygen, or fluorine atom, usually of another molecule.
一个分子的氢原子与一个带负电的原子相吸引的一种化学键，尤其是一个氮原子，氧原子，或氟原子通常与另外一个分子的原子相吸引。
