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be excellent at arguing positions/make complex idess understandable
例句：John Kenneth Galbraith was an economist, liberal thinker, author, professor, presidential advisor and ambassador. He. stood over two meters tall. He was excellent at arguing positions and making complex ideas understandable. These two qualities made Mister Galbraith a powerful personality able to influence people at the highest levels of government.
be an easy person to dislike
例句：He was also a productive writer and an effective critic of many popular ideas of his time. For some, he was an easy person to dislike.
be very sure of
例句：He was very sure of himself and his arguments.
