三名领先的竞争者陷入一场鏖战。The three leading contenders were locked in a dogfight.这使他们得以参加其中并成为主要竞争者。This puts them in the ballpark and makes them a major player.希腊依然是世界航运业强有力的竞争者。The Greeks are still powerful players in world shipp...
In 1818 Fresnel entered a competition sponsored by French Academy.1818年菲涅耳参加了法国科学院主办的一次竞赛.The difficulty was resolved by Fresnel with his addition of the concept of interference.菲涅耳通过加进来干涉概念,解决了这个困难.In many cases, the Si...