He had a profound knowledge of mantras and their efficacy.
他深谙各种咒语及其功用。
He has amassed a profound knowledge of eight languages by industry.
他靠勤奋而精通八种语言。
Is to weigh the pros and cons of a profound knowledge, but also an art.
利弊的权衡是一门高深的学问，也是一门艺术。
Is to weigh the pros and cons of a profound knowledge, but also an art.
利弊的权衡是一门高深的学问，也是一门艺术。
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