Kites whooshed above the beach at intervals.

　　風(fēng)箏在沙灘上空時(shí)隱時(shí)現(xiàn)。

　　Kites have been used for scientific purposes in the western world.

　　風(fēng)箏在西方已被用于科學(xué)目的。

　　Flying kites have quite a long history.

　　放風(fēng)箏的歷史由來已久。

　　Kites have been flown in Japan for hundreds of years.

　　風(fēng)箏在日本已經(jīng)有幾百年的歷史了。