If predator fish continue to flow through the penstocks and populate the river below the dam, they could harm native fish.

如果掠食性鱼类继续流过引水管道，并在大坝下方的河流中繁殖，它们可能会对当地的鱼类造成伤害。

A hydroelectric dam is essentially a massive gate, which redirects a river's natural flow through a large pipe called a penstock.

水力发电大坝本质上是一个巨大的闸门，它通过称为压力管道的大管道重新引导河流的自然流量。

As lake levels drop, non-native fish that live in warm surface waters in Lake Powell are getting closer to the dam and its penstocks.

随着水库水位的下降，生活在鲍威尔湖温暖地表水中的非本土鱼类越来越靠近大坝及其引水管道。

Rushing water flows through the penstock and turns the blades of a turbine, which is attached to a generator in an adjacent power station.

急流流过压力管道并转动涡轮机的叶片，涡轮机与相邻发电站的发电机相连。

Because the penstocks can be sealed at any time, a dam can hold back excess water during stormy seasons, and save it for dry ones.

由于压力管可以随时密封，因此大坝可以在暴风雨季节阻止多余的水， 并将其保存在干燥季节。