Plausible as this seems, it is still a theory and based on our more comprehensive knowledge of land-based animals.

这似乎是合理的，但它仍然是一种理论，这个理论是基于我们对陆生动物的更全面的认识。

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Archaelogists also discovered a number of larger land-based animals and plant fossils including the sharp tooth of an archosaur and the remains of some ancient conifer-like plants.

考古学家同事发现许多大型陆地动物和植物化石，比如一只祖龙的尖牙和一些古代针叶松类型的植物化石。

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Unsustainable use of land and forests, meanwhile, threatens to deplete Cambodia's natural assets upon which a good portion of growth is based.

与此同时，不可持续的土地和森林利用模式有可能侵蚀柬埔寨赖以取得其大部分增长的自然资源基础。

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This is a nonprofit group that helps develop land and farm-based businesses in and around the city of Burlington.

VOA: special.2010.10.25

A second part, about two thousand fifteen, will involve putting land-based systems in Europe.

VOA: special.2009.09.19

He is replacing it with a plan that would provide a combined land- and sea-based capability more quickly, focused on shorter range missiles Iran could use to threaten Europe, with the option of expanding later to cover longer range missiles if necessary.

VOA: standard.2009.10.23

Women recruited now will have to undertake an initial health screening and then join in either a land-based aerobics or a pool-based aqua-aerobics programme.

BBC: Pregnant women

That raises the heightened concern that, despite public U.S. proclamations that they would be hesitant to shoot down a North Korean missile launched over the ocean unless it appeared to be heading toward a known land-based target, such a shoot-down is still possible.

CNN: 5 things we still don't know about North Korea's nukes

Land-based explorations include a nine-day hiking trip and a nine-day multi-sport adventure with kayaking, snorkeling, mountain biking, and hiking.

FORBES: Galapagos Islands By Land And Sea