cow中的ow音标为/au/
例句
1、
The cows are artificially inseminated.
这些母牛被人工授精。
2、
In the natural course of events cows would wish to be milked more than twice a day
按照事情发展的自然规律，母牛每天应该挤奶两次以上。
3、
When his cows calve each year he keeps one or two calves for his family.
他的母牛每年产犊时，他都给自家留上一两头。
