施工队正在对地基进行脱水处理，以确保混凝土能够正常凝固。

The construction crew is ___dewatering the foundation to ensure proper concrete curing.

施工前需要先进行脱水处理，以减少淤泥中的水分含量。

The construction site requires ___dewatering the sludge to reduce its water content before work begins.