Lesson 30 Exploring the sea-floor
Focus：
并列连词and
并列结构的省略
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.
be confined to 局限于
two-dimensional adj. 二度空间的，二维的，平面的
= flat
=planer
a. 平面的,平坦的
hazard: 冒险,危险,危害
present
v. 呈现，提出； a. 现在的 n. 礼物，现在
irregularity 不规则
shallow water 浅水区
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 bed was flat.
open sea
复习：more than + v. n. : 不仅仅
passing thought一闪而过的念头
give a thought to sb./sth. 想象、思考
the bottom (which ) confines of the oceans
Sir James Clark Ross had obtained a sounding of over 2,400 fathoms in 1839, but it was not until 1869, when H. M. S. Porcupine was put at the disposal of the Royal Society for several cruises, that a series of deep soundings was obtained in the Atlantic and the first samples were collected by dredging the bottom.
put / place… at the disposal of sb
put / place …at sb’s disposal
He put his car at my disposal during his holiday.
I will put my room and my books at your disposal.
He placed 50 Yuan at my disposal.
谋事在人，成事在天
Man proposes, god disposes.
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.
worthy of = deserving 多用于表语，“值得……”，
worthy of + n 或being done.
This article is worthy of careful study.
This article is worthy of being carefully studied.
His deeds are worthy of praise.
His deeds are worth of being praised.
worthy + to be done
This article is worthy to be carefully studied.
There occurred nothing worthy to be mentioned. = there occurred nothing worthy of being mentioned.
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.
worth: 介词，用于系动词be 后面，后面只能跟名词或动名词。
That film is not worth seeing.
The exhibition is well worth visiting / a visit.
A burst of activity associated with the laying of submarine cables soon confirmed the Challenger's observation that many parts of the ocean were two to three miles deep, and the existence of underwater features of considerable magnitude.
burst : v.n. 爆发, 爆裂、炸破
a burst of speed:
速度的突然增加
a burst of energy:
精力旺盛
a burst of thunder:
一阵雷声
a bu
责任编辑:zhaotingting
