中英释义：
重点词汇
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骨干
backbone; mainstay; key element; core member; cadre; pillar; core; hard-core
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船员
mariner; hand; crewman; crew; mate; sailor; crew member
骨干
backbone; mainstay; key element; core member; cadre; pillar; core; hard-core
船员
mariner; hand; crewman; crew; mate; sailor; crew member