尽管投入了大量资金，公司的销售业绩在过去六个月里一直停滞不前。

Despite heavy investments, the company's sales performance has ___flatlined for the past six months.

尽管采取了新措施，公司的利润在过去三个月一直持平。

Despite new strategies, the company's profits have ___flatlined for the past three months.

这款新手机上市后销量很快趋于平缓。

After its launch, the sales of the new phone quickly ___flatlined.