A number of recent variations have further demonstrated the utility of the 1, 3 - dithiane system.几种最近的变体进一步阐明了1, 3- 二硫杂环已烷体系的用途.The salesperson demonstrated a new washing machine.推销员当众演示新式洗衣机的优点。The feasibilities of sma...
我们采用了针剂注射和放射治疗相结合的方法.We used a combined regimen of injection treatment and radiation therapy.我采用传统授课与实践和指导相结合的方式教授心理学。I teach psychology by way of a range of traditional lectures, practicals and tutorials.他发现自己盯着一座新旧结合的建...