This provides useful information on the type of occurrences.所有资料提供有关矿床类型的有价值材料.The latter studies are extremely useful to the analyst.后者的这些研究对于分析工作者极为有用.Combinatorial Theory is exceptionally useful in the real world.组合论在...
In business a poker face can be very useful.生意场上，不动声色会非常有用。"For heaven's sake!" Dot expostulated. "They're cheap and they're useful."“拜托！”多特反驳道，“它们又便宜又管用。”HDTV is especially useful if there are a lot of sp...
It is also worth tagging on an extra day or two to see the capital.为了看看首都，再多个一两天也是值的。Professor Orr has developed interesting ways of tagging chemical molecules using existing laboratory lasers.奥尔教授发明了用现有实验室激光设备给化学分子做记号的种...