Experts have confirmed that the fossilised plants are liverworts, a simple species which has no roots or stems.

在这里输入译文专家已经证实这些植物化石是一种没有根和茎的原始苔类。

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Evans says the crisis stems from a simple fact.

Evans表示，一个简单的事实导致了这一危机。

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The problem Mom is having stems from the simple mistake of faithfully rendering that excellent implementation model as an interface for users.

你母亲遇到的问题是因为忠实地将优秀的实现模型作为用户界面造成的。

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By design, the Internet's power stems from its simple rules and communal nature.

FORBES: Magazine Article

The reason is simple and stems from the constitutional question that arose from a federal program in which all citizens were required to participate.

WSJ: Thomas Saving: Obama's Debt-Ceiling Scare Tactics