溢洪道（yì hóng dào）是水库等水利建筑物的防洪设备，多筑在水坝的一侧，像一个大槽，当水库里水位超过安全限度时，水就从溢洪道向下游流出，防止水坝被毁坏。包括：进水渠 控制段 泄槽 出水渠。
溢洪道控制段是控制水流下泄的关键部位。溢洪道；溢水管。
The control section of spillway is the key section to curb the water flow.
为降低密西西比河洪峰，近四十年中，摩根萨溢洪道首次开闸泄洪。
The Morganza Spillway floodgates were opened for the first time in nearly forty years to lower the crest of the flooding Mississippi River.
溢洪道能让陆战队们甩掉追兵——然后他就能继续执行自己的任务了。
The spillway would allow them to break contact with their pursuers-then he could get back to his mission.
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