Translation of "Poorly" in Chinese

The lubrication system was poorly designed.

润滑系统设计得不好。

Thanks to a cold summer, beer has sold poorly.

多虧了冷夏，啤酒賣的不好。

It's better to do nothing than to do something poorly.

什麼都不要做比做錯了好。

I've been feeling poorly for the last couple of days.

过去两天我觉得不太舒服。