1.
Finally a fourth letter came, a large square letter, sealed with a black seal, and a flying seagull upon it.
最终，第四封信到了。 这是一封四四方方很大的信，用了黑色的封蜡，上面有一只飞翔的海鸥。
2.
I had got four letters before Sunday.
星期日以前我收到了四封信。
3.
He left two letters at the first house, four letters at the second house, and three letters and a parcel at the third house.
他在第一栋房子送了两封信，第二栋房子送了四封信，在第三栋房子送了三封信和一个包裹。
4.
Fourth cover: Outside back cover of a periodical.
封四:期刊的封底。
5.
IV. Feudal Serfdom in Old Tibet
四、旧西藏的封建农奴制
6.
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。
7.
PTFE Raw Material Belt
聚四氟乙烯生料带，又名密封带、止泄带
8.
unsintered polytetrafluoroethylene tapes for thread sealing
螺纹密封用结非烧聚四氟聚乙烯带
9.
The pope had canonized her on April 30, 2000.
教宗在二○○○年四月三十日册封她为圣人。
10.
Critique of the Feudal View of Virtue from the Ideological Field in the May Fourth Movement
“五四”思想界对封建贞操观的批判
11.
In 1204, he was posthumously created E'Wang or Prince E. :
1204年(宁宗嘉泰四年)，追封“鄂王”；
12.
The putty gives a good seal round the window.
窗户四周泥的油灰密封效果很好.
13.
Wang Cheng was born in Kaifeng city, Henan province in 1945.
王澄，一九四五年生，河南开封人。
14.
Microsystem Technology (Serials Four)──Packaging Technologies
微系统技术（连载四）──封装技术
15.
Study on Performance of PTFE Sealing Materials in 4-Way Reversing Valve of R410A Air-Condition
R410A条件下四通换向阀PTFE密封性研究
16.
Reflections on Chen Duxiu's "Anti-feudal" Theory During the May Fourth Movement
对五四时期陈独秀“反封建”说的反思
17.
(4) The feudal landlord state was the organ of power protecting this system of feudal exploitation.
四、保护这种封建剥削制度的权力机关，是地主阶级的封建国家。
18.
The feudal landlord state was the organ of power protecting this system of feudal exploitation.
四、护这种封建剥削制度的权力机关，是地主阶级的封建国家。