preformation

preformation怎么读

英式音标：[ˌpri:fɔ:\'meɪʃən]

美式音标：[ˌprifɔ\'meɪʃən]

preformation的意思释义

n.

预先形成；

英英释义

n.a theory (popular in the 18th century and now discredited) that an individual develops by simple enlargement of a tiny fully formed organism (a homunculus) that exists in the germ cell

同义词：theory of preformation

preformation用法及例句

例句参考

Cluster preformation as barrier penetrability

Organ preformation in mayapple as a mechanism for historical effects on demography.

$\\alpha$ particle preformation in heavy nuclei and penetration probability

Preformation or Epigenesis?. (Book Reviews: Oogenesis. The storage of developmental information)

Extreme preformation in alpine Polygonum viviparum: an architectural and developmental analysis.

Mechanisms of metazoan germ cell specification: epigenesis and preformation

Mechanisms of germ cell specification across the metazoans: epigenesis and preformation.

Theories in early embryology: close connections between epigenesis, preformationism, and self-organization

Crown architecture of Larix laricina saplings: shoot preformation and neoformation and their relationships to shoot vigour

preformation相关例句

1. Then he scraped away the dirt, and exposed a pine shingle.

接着他刨去泥土, 下面露出一块松木瓦块.

来自英汉文学 - 汤姆历险

2. He hung out his grandfather\'s shingle.

他挂出了祖父的行医招牌。

来自辞典例句

3. On this beach there\'s too much shingle and not enough sand.

在这个海滩上,圆卵石太多,沙太少.

来自辞典例句

4. Every leaf , brick , shingle and blade of grass is fresh - washed and shining.

每片树叶, 每块砖瓦乃至一 叶小草,都被洗刷一新,闪闪发光.

来自辞典例句

5. We listened to the rain on the shingle roof.

我们听着雨水打在屋顶的木瓦上.

来自辞典例句

[ shingle 造句 ]