| 1. | The nucleoplasm is surrounded by the nuclear envelope .
核质被核膜包裹。 |
| 2. | Please put it in the envelope with your letter .
请你把它和信一起放信封。 |
| 3. | Fold the letter and put it in an envelope .
将信折好放进信封。 |
| 4. | Do n't forget to stick a stamp on the envelope ..
不要忘记在信封上贴邮票。 |
| 5. | This envelope gradually peters out with altitude .
这一包层随高度而逐渐稀薄。 |
| 6. | Lady : i want some envelopes please .
女士：我想买些信封。 |
| 7. | He knew it was a bank envelope .
他知道这是个银行的封袋。 |
| 8. | The surface of the sun is a glowing gas envelope .
太阳的表面是一层炽热的气体层。 |
| 9. | Mrnas could cross the chloroplast envelope in vivo .
在体内mRNA能穿过叶绿体外膜。 |
| 10. | Feliks saw the crest on the back of the envelope .
费利克斯看了看信封背面的顶饰。 |
