1.
Happening, done, or appearing every three weeks.
每三周一次的每三周发生、出现或做一次的
2.
Happening, done, or appearing three times a week.
每周三次的一周发生、出现或做三次的
3.
A periodical published triweekly.
三周刊每三周发行一次的期刊
4.
We have English classes three times a week.
我们一周上三次英语课。
5.
Measure thrice Before you cut once.
三次量布，一次剪开(周密准备才可行动)。
6.
Three sub-cantonments shall be placed in the periphery of each of these main cantonments.
三个次要营地应分布在每一个主要营地的周围。
7.
Once a week for the dry skin, three time for the oily skin, and twice for the neutral skin.
干性皮肤每周一次，油性皮肤每周三次，中性皮肤每周二次。
8.
a periodical that is published every week.
一周出版一次的期刊。
9.
Occurring, appearing, or done once a week or every week.
每周一次的或每周发生的，每周一次或每周出现的，每周一次或每周完成的
10.
Wednesday's event will be the last total lunar eclipse until Dec. 20, 2010. Last year there were two.
周三晚上的这次月食是2010年12月20号之前最后一次月全食。而去年一年就发生了两次。
11.
Beside, a freelance designer comes three days a week.
另外还有一位特约设计师，每周来三次。
12.
I generally come here for lunch two or three times a week.
我一般每周来这儿吃二、三次午餐 。
13.
Do them for at least 20 minutes a session three to five times a week.
试一试，每周做三至五次，每次至少20分钟。
14.
Happening or appearing once in or every two weeks.
两星期一次的，隔周的每两周发生或出现一次的
15.
The last total lunar eclipse until 2010 occurs Wednesday night.
报道说的是，2010年之前的最后一次月全食于周三晚上出现。
16.
The ship is scheduled to sail within three week from the date of my last advice of june 12th.
该轮预定于我方6月12日的最后一次通知后三周内开航。
17.
A while ago a Vampire was celebrating its jubilee in my tavern- their three hundredth resurrection on the battlefield!
刚才一个吸血鬼在我酒馆庆祝他的周年，第三百次在战场复活！
18.
But Sally is still training two or three times a week with the boys in her school.
但是Sally仍然每周和学校里的男生一起训练两三次。