(The General Assembly) declares that there has been established a lawful government (the Republic of Korea) having effective control and jurisdiction over that part of Korea where the Temporary Commission was able to observe and consult and in which the great majority of the people of all Korea reside. this Government is based on elections which were a valid expression of the free will of the electorate of that part of Korea and which were observed by the Temporary Commission. and that this is the only such government in Korea.

선생님 원문입니다. 마지막 문장의

 and that은 하나의 관용어구인가요?

해석에는 " 따라서 이 정부는 한반도에 존재하는 유일한

그러한 정부 " 라고 되어있는걸 보니 and that의 뜻은

" 따라서 " 인지요?

Aviation experts are urging the more rapid introduction of more efficient jet engines that burn less fuel.

일단 사전에는 rapid의 비교급이 rapider인데..

more rapid도 rapid의 비교급인가요?

아니면 the more자체가 또 다른 뜻이있는지?ㅠㅠ