1.
I made some rough calculations on the back of an envelope .
我在信封背面做了一些估算。
2.
I make some rough calculation on the back of an envelope.
我的信封背面大概算了一下。
3.
Feliks saw the crest on the back of the envelope.
费利克斯看了看信封背面的顶饰。
4.
The image is of an ill-thought-out idea scribbled on the back of an envelope.
它的形象是未经缜密考虑，潦草地在信封背面上打草稿的—个主意。
5.
A detachable extension to the back of an envelope, having a perforated edge and special marketing information or an order form on it.
信尾信封背面可拆掉的附加部分，其上有打孔的边缘和特定的市场信息或订购单
6.
The opposition Party (Labour) dismisses the Charter as a "back of the envelope" policy, hurriedly put together without due consideration.
反对党(工党)则斥之为一个未经充分考虑，匆匆忙忙地凑合起来的涂在信封背面上的政策。
7.
E.g. "The Chancellor of the Exchequer's budget is a back-of-the-envelope affair without any thorough-going research or considered analysis."
例句：“财政大臣的预算是一个未经任何彻底研究或仔细考虑分析过的涂在信封背面上的玩意儿。”
8.
We seal the back of envelopes.
我们把信封的背面封上。
9.
The plans were drawn on the back of the envelope.
计划写在信封的背面。
10.
Turning it over, she saw written on the back:
她把信封翻过来，看到背面写着：
11.
Write your address on the back of envelope.
在信封的背面写上你的地址。
12.
Write your address on the back of the envelope.
请将您的地址写在信封的背面。
13.
I made some rough calculations in the back of an envelope .
我在信封的背面做了一个粗略的估算。
14.
mechanical seal with low back pressure
背面低压式机械密封
15.
The ground was frozen, and it froze our backs while we slept.
地面都冰封了，我们睡在地上都冻脊背。
16.
I wrote out the advertisement on the back of an old envelope and read it aloud to see if it made sense.
我把广告写在一个旧信封的背面，然后大声地读了一遍看写得是不是那么回事。
17.
You know that the famous waistcoat was found in his house, containing the letter which stopped the signature of the marriage-contract.
你们知道：那件曾轰动一时的背心是在伯爵的家里找到的，里面藏着那封阻止签订婚约的信。
18.
Fig4. Self-seal means adhesive tapes attached, so not the mails but you should accomplish the sealing job instead of open-wide delivery.
图四：自封信封意思是信封口上面带着双面胶，不是信封自己会把自己封上，不要敞着就寄出去了。