In human epithelial cells, sex chromatin appears as a small granule attached to the nuclear envelope

在人的上皮细胞中，性染色质象个小颗粒，连在核膜上。

属类：综合句库--

mRNAs could cross the chloroplast envelope in vivo

在体内mRNA能穿过叶绿体外膜。

属类：综合句库--

The flap of the envelope has come unstuck

这信封的口没粘牢，开了。

属类：综合句库--

This letter won’t go into this small envelope .

这信装不进这小信封。

属类：综合句库--

This card just fits nicely into that envelope .

这张卡片正好能装进那个信封。

属类：综合句库--

The envelope tears easily.

这种信封容易扯破。

属类：综合句库--

inner glass for vacuum vessels (excl. those transformed by a casing or any other kind of protective envelope into vacuum flasks or other vacuum vessels)

真空容器玻璃胆(不包括通过加套或任何其他种类的保护壳制成的真空箱或其他真空容器者)

属类：物品名称-一般商品-玻璃制品

On the desk, among the neat array of papers, a large envelope was uppermost

纸张整齐地堆放在桌上。最上面有一个信封。

属类：综合句库--

Chinese artistic letter writing paper and envelope

中式仿古信笺、信封

属类：物品名称-文体用品-

The envelope of an ovule.

珠被胚珠的外皮

属类：综合句库--