Funding has rushed back to such research, and the United States now has 128 stem-cell lines, up from just 21 in 2009.
资金重新涌入这个研究领域,美国干细胞株的数量已从2009年的21个增加到现在的128个。
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But even Mr Li says the importance of lottery income in helping to make up shortfalls in state social security funding means there will be no turning back the clock.