1.serve...as用来做什么以便达到某目的

2.impressive令人印象深刻的，伟大的

3.be replaced by 被替代

4.be used to do/for doing sth用来做什么

5.match：equal，be as good as 与之媲美

6.of this kind这种中

7.mark标志：represent，symbolize

8.sail帆

ships with sails=sailing ships

9.era；age，epoch有着鲜明特征的历史时代

10.have a lot of bad luck：have a piece/stroke

of bad luck 非常不走运

11.strick：attack侵袭，袭击

12.from side to side：continously

from house to house挨家挨户

from time to time不时，时而

13.on board：on the ship

14.spare多余的

15.fit把什么东西安装上

16.call in召集

17.ahead在什么人前面 plan ahead时间上提前

18.at tremendous/high/low/top/full speed

tremendous程度之大之高之快

19.remarkable：了不起

同义词：extraordinary，outstanding

20.considering+名/that/who/what/how

21.there is no doubt that

it seemed certain that 对过去发生的事情的愿望