Critics also point out that the shallow seaways had retreated from and advanced on the continents numerous times during the Mesozoic.

批评者还指出，在中生代期间，浅海通道曾多次从陆地退回，又向陆地前进。

At the end of the Cretaceous, the geological record shows that these seaways retreated from the continents back into the major ocean basins.

地质记录显示，在白垩纪末期这些航道从大陆撤退，回到主要的海洋盆地。

One of the problems is that no one proves whether these old machines work before they hit the seaways.

问题之一是没人知道这些旧机器在海运之前能否正常工作。

At the end of the Cretaceous, the geological record shows that these seaways retreated from the continents back into the major ocean basins. No one knows why.

在白垩纪后期，地质资料表明这些浅海都从大陆退回到主要的海洋盆地内了，没有人明白为什么。

Is the use of ships passing through mainland neighboring countries seaways shipping a passenger transport form, depending on the voyage can use medium ship, also can use small ships.

是使用船舶通过大陆邻近国家海上航道运送客货的一种运输形式，视航程可使用中型船舶，也可使用小型船舶。