Translation of "approximative" into Chinese

I first came in contact with the Salazars approximately two years ago.

大概 2 年前 , 我 首先 与 萨拉 扎 兄弟 取得联系 。

Because China does not provide official statistics, it is difficult to go beyond broad approximations.

由于中国没有提供官方统计资料,因此只能大致估算。