previously

Guyana's railways were previously owned by private companies..圭亚那的铁路先前为私营公司所拥有。

The contract was awarded to a previously unknown company..该合同给了一家先前不知名的公司。

真题例句...the scientist confirmed the snake was a previously unknown species after conducting a genetic analysis of tissue samples...CET42017.6听力题

真题例句...The International Union for Conservation of Nature had previously considered the area a "possible range" for the species...CET42017.12听力题

真题例句...Those students who previously turned to urban schools for better education now are moving back to their local rural schools...第三套CET42014.6文本题

真题例句...Where I had previously struggled to work while ill...第三套CET42012.12阅读理解