The level and the requirements of the AP physics B are the same as physics course in senior high school in China. Students can deal with easily if they take the AP courses.
ap物理b的难度和要求相当于中国的高中物理，相信同学们上过ap课程之后，应该能比较轻松地解决它。
Studying the non-leptonic decay of B meson is an important task in particle physics, and any breakthrough in theory may take new blood to this field.
介子的两体非轻子衰变过程是粒子物理中一个很重要的研究课题，任何理论上的突破都会引起广泛的关注。
One of the most challenging open problems in heavy quarkonium physics is the double charm production in annihilation at B factories.
B 工厂中通过双的单举和遍举的产生是重夸克偶素物理中的一个具有很大挑战性的课题。
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