The molecular hamiltonian is formidable enough to strike terror into the heart of any quantum chemist . 分子的哈密顿函数麻烦得足以使任何一个量子化学家心惊胆战。
2.
The hamiltonian of the system is the driac operator which as a matrix differential operator is not semibounded from below 系统的哈密顿函数是作为矩阵微分算子的狄拉克算子，它不是半有界的。
