请问这句怎么翻译？

tcogh327

The most dramatic weather systems found in the tropics are tropical cyclones: called hurricanes in the Atlantic, Caribbean and eastern Pacific, cyclones in the Indian Ocean and typhoons in the western North Pacific. They are low pressure systems, typically 200-2,000 km across, with wind speeds greater than 120 km/hour. They consist of deep cumulonimbus clouds, up to 12 km high, spiralling around a central, clear eye where air is descending. They form over warm tropical oceans, but cannot form equatorwards of 5°, as the Coriolis force is too weak. They rapidly decay when they move over land and are cut off from their source of warm water.
其中有一句我不知道怎么翻译：
They form over warm tropical oceans, but cannot form equatorwards of 5°
我的翻译是它们来自热带海洋，但是却不能离开赤道5度。

Youth

大概就是“赤道附近5个纬度之内的热带海洋”吧？或者说“南北纬5度之间的热带海洋”？

tcogh327

我知道了，应该是翻译作“他们自热带海洋生成，但是仅仅是南北纬5度之间的区域”。这样翻译怎么样？

Youth

我觉得可以的：）