swale

1. He took no heed of the course he pursued, so long as that course led him through the swale bottom.
   他不再理会走什么路，只要这条路能走出这片谷底就行。
2. Soil erosion is weaker in high and flat area than that in low area and swale, this new regularity differs from the past.
   高平地土壤侵蚀较弱，低地与洼地侵蚀较强，这是本文得出的与以往不同的重要规律。

noun

1. a low area (especially a marshy area between ridges)