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度米文库汇编之新概念英语第四册句子精粹Lesson30海底勘探

度米文库汇编之新概念英语第四册句子精粹 Lesson30:海底勘探

度米文库汇编之新概念英语第四册句子精粹Lesson30海底勘探

课文30 海底勘探

542. our knowledge of the oceans a hundred years ago was confined to the two-dimensional shape of the sea surface and the hazards of navigation presented by the irregularities in depth of the shallow water close to the land.

100年前,我们只知道海洋是二维平面形的,以及靠近陆地浅水区的深浅不一能给航行带来危险。

543. the open sea was deep and mysterious, and anyone who gave more than a passing thought to the bottom confines of the oceans probably assumed that the sea bad was flat.

无边无际的海洋深邃而又神秘,凡是稍稍想过大海海底的人大概都会认为海底是平坦的。

544. sir james clark ross had obtained a sounding of over 2,400 fathoms in 1839, but it was not until of deep soundings was obtained in the atlantic and the first samples were collected by dredging the bottom.

1839年,詹姆斯.克拉克.罗斯爵士曾测得海水深度超过2,400英寻;但直到1869年,皇家学会用英国“豪猪”号舰艇进行了几次巡航后,才在大西洋测得一个海水深度,同时能过挖掘海底,取得了研

究海底的首批样品。

545. shortly after this the famous h. m. s. challenger expedition established the study of the sea-floor as a subject worthy of the most qualified physicists and geologists.