Question

真诚的希望各位朋友帮我解答下新概念英语第四册30课其中比较难的几句

我现在学习新概念英语第四册30课遇见几句难点句子麻烦各位朋友帮我解答下!(1)and the hazards of navigation presented by the irregularities in depth of the shallow water close to the land这就话书上翻译为,以及靠近陆地潜水区的深浅不一定能给船带来危险,这里的the hazards of navigation presented by the irregularities 该怎么理解这句话呢???(2) but
it was not until 1800, when H.M.S. Porcupine was put at the disposal of the
Royal Society for several cruises这句话书上翻译为,但直到1869年,皇家学会用英国的豪猪,号舰艇进行了几次巡航后!请问这里的put怎么理解呢???

Answer 1

应是put sth at the disposal of sb，句中用被动语态

Answer 2

我现在正在学习新概念英语第四册 17这篇课文,其中有几句需要大家帮我解答下这个问题变成是否. 这样理解， the question of whether .没什么特殊的，就 ..