lowing['lәuiŋ]
n.
牛鸣

Lowing \Low"ing\, n.
The calling sound made by cows and other bovine animals.
Low \Low\ (l[=o]), v. i. [imp. & p. p. {Lowed} (l[=o]d); p. pr.
& vb. n. {Lowing}.] [OE. lowen, AS. hl[=o]wan; akin to D.
loeijen, OHG. hl[=o]jan, hluojan.]
To make the calling sound of cows and other bovine animals;
to moo.
The lowing herd wind slowly o'er the lea. --Gray.