本次的年度征文设题很巧妙，体现了现代科技与传统人力对决的意思。
But questions remain about how realistic the goal and timeframe are, given recent and steep Nasa budget cuts, and some scientists are concerned that the plans are driven by geopolitical goals.，这一点在im钱包官方下载中也有详细论述
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free_table[bucket] = h;