Travel gets easier the moment you stop relying entirely on real-time translations. Reading signs, ordering food, or asking directions becomes less of a performance and more of a conversation — which is exactly what Babbel was designed to teach.
"Everyone has been dreaming for 40 years of one robot hand to rule the world. A lot of people think it could be the humanoid hand," says Pierce.
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* @param arr 待排序数组
public companion object {
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