请高手翻译一下：从over the years

请高手翻译一下：从over the years
Many of the well-known kinds of lady beetles come from Asia or Europe. They now are common throughout the United States. American scientists imported one kind of lady beetle, the multicolored Asian lady beetle, as early as 1916. They released them as an attempt to control some kinds of inspects. Over the years, the beetle has become established, possibly helped by some that arrived with imported plants on ships.