late heart stage

基本解釋

There were only two layers of nucellus which had abundant cytoplasm and reserved substance, and were consumed at the stage of late heart-shaped embryo.
珠心細(xì)胞只有兩層，細(xì)胞核大，胞質(zhì)豐富，內(nèi)含貯藏物質(zhì)，至心形胚期逐漸解體。

But this second, more pernicious, late stage failure issue has at its heart the same issue you identify: hubris.
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But late-stage trials presented here at the annual meeting of the American Heart Association were promising enough that Acorn plans to file for marketing approval with the U.S. Food and Drug Administration by Dec. 10, with hopes of a decision in 2005.
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