Yak-38

He yakked on endlessly about his wife.

关于他的妻子, 他地说个没完。

The jokes get yaks.

那笑话引人发笑。

Only because yak is living in remote area and oxherd, with low knowledge,  has less communication with outside world , the yak is less heard and popular as sheep and milk cow.

只因牦栖息在偏远地区，养畜牦的牧民甚少与外界接触，知识水平都普遍低下，以致牦的经济价值及羊和乳为人知。