新概念英語第四冊原文及翻譯lesson7-9-文庫吧資料
2024-12-06 23:54本頁面
【正文】 are plex enough that they may be hardpressed to get a deal at all. Why? One difficulty is to construct the agreements. The Americans would happily reach one accord on standards for medical devices and them hammer out different pacts covering, say, electronic goods and drug manufacturing. The EU following fine continental traditions wants agreement on general principles, which could be applied to many types of products and perhaps extended to other countries. From: The Economist, May 24th, 1997 New words and expressions 生詞和短語 slaughter v. 屠宰 fit adj. 適合 grace v. 給...增光 tariff n. 關稅 standard n. 標準 dialysis n. 分離，分解。 人們發(fā)現(xiàn)，某些蝙蝠能發(fā)出尖叫聲，并能通過回聲來確定并躲開障礙物，或找到它們賴以為生的昆蟲。從測定海深到測定魚群，這一進展比較容易。任何固體者反射聲音，反射的聲音因物體的大小和性質(zhì)的不同而不同。敲打船體所發(fā)了的聲音會從海底傳回來，測出回聲間隔的時間，便可算出該處海洋的深度。固體障礙物越遠?！ ∫笍乩斫膺@句話的意義，我們應先回顧一下人類最近的幾項發(fā)明。新概念英語第四冊原文及翻譯Lesson7~9新概念英語第四冊原文及翻譯Lesson7 Bats 蝙蝠 In what way does echolocation in bats play an utilitarian role? Not all sounds made by animals serve as language, and we have only to turn to that extraordinary discovery of echolocation in bats to see a case in which the voice plays a strictly utilitarian role. To get a full appreciation of what this means we must turn first to some recent human inventions. Everyone knows that if he shouts in the vicinity of a wall or a mountainside, an echo will e back. The further off this solid obstruction, the longer time will elapse for the return of the echo. A sound made by tapping on the hull of a ship will be reflected from the sea bottom, an
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