The long-range goal of the Research Training Groups in the Mathematical Sciences (RTG) program is to strengthen the nation's scientific competitiveness by increasing the number of well-prepared U.S. citizens, nationals, and permanent residents who pursue careers in the mathematical sciences, be they in academia, government, or industry. 这句话中的“be they”是啥意思？我从来没见过这种用法/语法。
这句话中的“be they”是啥意思？我从来没见过这种用法/语法。
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