新修建的灌溉系统实现了对水流的有效引导。

The new irrigation system allows for effective ___channeling of water flow.

遗传的渠道化作用解释了为什么某些特征在不同环境下仍能保持一致。

Genetic ___canalization accounts for why some traits stay consistent despite varying environments.

工程师们设计了新的排水系统，通过引导水流来防止洪水。

The engineers designed a new drainage system by ___channeling of water flow to prevent flooding.