阿尔·恩特说，今年的拉尼娜现象从去年夏末开始形成，在一月成熟。
This year's la Nina started building late last summer and was mature by January, Arndt said.
一旦条件成熟，浮游植物种群数量会呈爆炸性增长，这一现象被称为水华。
When conditions are right, phytoplankton populations can grow explosively, a phenomenon known as a bloom.
对于这一现象只能解释为，在生化意义上发育至八个细胞的胚胎比只有4个细胞的初级胚胎要成熟。
The explanation for this must lie in the biochemical maturity of eight-celled embryos compared with their junior, four-cell siblings.
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