Despite his knowledge, the professor lacks the personal charisma to captivate his students.

charisma 来自希腊语，原指"神赐的恩典"。在现代英语中表示"个人魅力"或"领袖气质"，特指那种能自然吸引和影响他人的特殊人格魅力。这种魅力往往与学识无关，更多体现在个人的言谈举止、气场和亲和力上。