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In total, directors generally spend between one and three hours a week on activities relating to their position on the Board of Directors.
，这一点在WPS下载最新地址中也有详细论述
Nature, Published online: 25 February 2026; doi:10.1038/s41586-026-10142-1
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But for the US oil firms that Trump wants to invest heavily in Venezuela, the question is a simple one - do the numbers add up?