In many developed countries, 70% to 80% of the population has used some form of alternative or complementary medicine (e.g. acupuncture).
在许多发达国家，70% - 80%的人口使用某种形式的替代或补充医学(例如针灸)。
2
RNA molecules form double stranded helices, just as do DNA molecules, by Watson Crick pairing of nucleotides on the two complementary strands of the helix.
RNA分子能像DNA分子那样形成双链螺旋，通过沃森·克里克配对，两个螺旋的核苷链互补。
3
XPath is an excellent complementary technology for XForms on both the client and the server; once you've mastered XPath, you can use it in your forms, and in the form processor.