The blink of beacon could be seen for miles.灯塔的光亮在数英里之外都能看见.These techniques include the ionospheric tomography, airglow, GPS beacon, conjugate observations and radar interferometry.这些方法包括断层扫描技术 、 大气晖光之影像 、 全电子密度之变化 、 共轭...
He branched off through Covent Garden.他从古凡园穿过去.After a few miles, a small road branched off to the right.过了几英里，右侧出现一条小岔路。However, it is difficult to produce multi branched i heptane and restrain its cracking.正庚烷异构化的难点在于高...
介绍了苯乙酸的生产方法 、 用途及市场.The production process, use and market of phenylacetic acid were introduced.介绍了鉴别氯代乙酸的反应原理和操作方法.Reaction principles of chloroacetic acid detection and its operation Methods: Were introduced.在此反应条件下, 乙...