They would have to go down around the continent of South America, like ships used to do before the Panama Canal.

他们将不得不绕过南美洲大陆，就像巴拿马运河之前的船只一样。

Just like warships, merchant ships used oarsmen, but coordinating the hundreds of rowers in both types of ship was not an easy task.

和军舰一样， 商船也有桨手，但要协调两艘船上的数百名桨手， 可不是一件容易的事。

Canadian explorers have found one of two ships used by the British Arctic explorer Sir John Franklin to search for the Northwest Passage 170 years ago.

加拿大探险家发现了英国北极探险家约翰·富兰克林爵士(Sir John Franklin)170年前探索西北海道使用的两艘船只之一。