Our company is rolling out its new line of cell phones.

我们公司正在推出新的手机系列。

In this case, Augie is giving Lillian the heads up about the fact that their company is rolling out its new line of cell phones.

在这种情况下，奥吉提醒莉莲他们的公司正在推出新的手机系列。

Six months ago, he was selling a line of cell phones that was all the rage, and customers were beating down his door to get one.

六个月前，他销售的手机系列风靡一时， 顾客纷纷上门购买。