当然是在激流水道中，要求运动员通过20 ~30个水门。
On a whitewater course, of course. Competitors are required to pass 20 to 30 gates.
像河流和小溪那样的流水称为激流生态系统；像湖泊和池塘的死水称为静水生态系统。
Flowing waters like rivers and streams are called lotic ecosystems; standing water like lakes and ponds are lentic.
流水也同样形成了峡谷中滔滔的激流。
All that flowing water has also created the canyon's white knuckle rapids.
流水也同样形成了峡谷中滔滔的激流。
All that flowing water has also created the canyon's white knuckle rapids.
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