But developing blood made from the cells of spare IVF embryos will raise difficult ethical issues for people not happy with the idea of destroying embryos to create stem cells.

然而，并非所有人都赞同从多余的体外受精胚胎中提取干细胞制造血液。这将势必引起一场巨大的道德争议。

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But they won't raise rates quickly enough to stem the inflation momentum.

不过他们加息的速度不足以压制通胀势头。

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On the basis of growing thick stem, increasing stem number will raise markedly asparagus yield.

在培育粗茎的基础上提高出茎数可以显著提高石刁柏产量。

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The iPS cells, which have many of the same basic properties, do not raise the same ethical questions as embryonic stem cells because they come from skin or now fat cells that have been reprogrammed to go back in time, so to speak, and have the ability to turn into any other kind of cell in the body.

CNN: Study: Human fat yields multipurpose stem cells