These are not □□□□□□□ perfect peop □□□□□□□le. These are □□□□□□□ deeply flawe □□□□□□□d people. But □□□□□□□ they made co □□□□□□□ntributions. □□□□□□□And I think w □□□□□□□hat it means □□□□□□□is we have to □□□□□□□ acknowledge, □□□□□□□ right now in □□□□□□□ the 21st-cen □□□□□□□tury, how muc □□□□□□□h of what we □□□□□□□have today is □□□□□□□ built on the □□□□□□□ backs of peo □□□□□□□ple whose con □□□□□□□tribution nev □□□□□□□er gets ackno □□□□□□□wledged. ——这句 □□□□□□□话放在现在说,好像显得更有 □□□□□□□意义了。 □□□□□□□