这些探险很可能是受当地人口增长和政治局势的影响的，以及探索未知水域的带来挑战和刺激感。
These expeditions were likely driven by population growth and political dynamics on the home islands, as well as the challenge and excitement of exploring unknown waters.
因此，和英国人一样，Shirase 把他的探险描述为对知识的探索：他会带回化石，进行气象测量，并探索未知的大陆。
So, like the British, Shirase presented his expedition as a search for knowledge: he would bring back fossils, make meteorological measurements and explore unknown parts of the continent.
今年冬天，他们将与探索中美洲以寻找经典玛雅文化的探险队进行交流。
This winter they'll interact with an expedition exploring Central America in search of the classic Maya culture.
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