Translation of "Smoothly" in Chinese

This zipper doesn't zip smoothly.

這拉鍊卡卡的。

This car is running less smoothly than it used to.

這輛車沒有以前跑得那麼順暢了。

In order to move the project along smoothly, we have revised the plan several times.

为了顺利推进项目，我们已经修订了几次计划。