1.
Modern Public Domain: the Alleochemicals level of Civil Society;
现代公共领域:市民社会的次生性层级
2.
secondary natural radionuclides
次生天然放射性核素
3.
What's the most memorable sexual experience you've ever had?
你记忆最深的一次性生活是哪一次?
4.
secondary gonocyte
次级性原细胞, 次级生殖母细胞
5.
Asian Subprogramme on Biotechnology and Biodiversity
亚洲生物技术和生物多样性次级方案
6.
Studies on the Insecticided Activity Secondary Chemicals of Tropical Plant;
热带植物次生物质杀虫生物活性研究
7.
Bioactivity Screening for Secondary Metabolite of Rhizosphere Bacteria
根围细菌次生代谢物的生物活性筛选
8.
Study on Bioactivity and Photoactivity of Wild Plant Nanshanwang Secondary Metabolitic Meterials;
野生植物南山王次生化合物的生物活性研究
9.
In good ecosystems, resources are used many times.
在良性生态系统中，资源会多次使用。
10.
It's more hygienic to use disposable paper tissues.
使用一次性餐巾纸更为卫生。
11.
happening again (especially at regular intervals).
再一次发生（特指经常的周期性的）。
12.
Don't sleep with him on the first date.
别在初次约会时就跟男人发生性关系。
13.
The first time I had sex was on my twentieth birthday．
我过二十岁生日时有了第一次性经历。
14.
The chances of such a tragedy happening again are very remote．
这种悲剧再次发生的可能性微乎其微。
15.
EOR SURFACTANT INDUSTRIALIZE PRODUCTION
三次采油用表面活性剂的工业化生产
16.
The Antipathogen Activities and Structure-activity Analysis of Secondary Substances from Plants;
植物次生物质的抗病活性及构效分析
17.
Study on Anti-TMV Activity of Secondary Substances from Walnut Seedcases;
核桃青皮中次生物质抗病毒活性研究
18.
A Compared Study of Personality Characteristics in Military Medical Students of Different Degree;
不同层次军校医学生的个性特征比较