▲ 假想图由 Gemini 生成
const bufferAhead = bufferedEnd - current;
，这一点在heLLoword翻译官方下载中也有详细论述
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The abrupt shift in strategy was laid out by the space agency’s recently confirmed administrator, Jared Isaacman. Announcing the changes on Friday, he said that Nasa would introduce at least one new moon flight before attempting to put humans back on the lunar surface for the first time in more than half a century, in 2028.