A cow 's estrus cycle averages 21 days.

母牛的发情周期平均为21天。

youdao

Finally, it lists all the piano-2-works which the author considered as Schumann 's cycle.

最后还列出了笔者认为是套曲的舒曼所有钢琴作品。

youdao

This article discusses the operation parameters and cleaning effect of VFEA craft' s cycle circuit in Xining region.

对文泡间电酸洗净化工艺在西宁地区的循环回路、工艺参数及净化效率进行了探讨。

youdao

And so she wants to have a visual representation of life's cycle."

VOA: special.2011.06.15

That's when I have difficulty getting out of this downward, vicious cycle.

那时我将很难脱离这种下行，恶性的循环。

哈佛公开课 - 幸福课课程节选

So that's a virtuous cycle.

所以是个良性循环。

哈佛公开课 - 幸福课课程节选

Plans to extend eastwards one of London's cycle superhighways have been sent out to public consultation.

BBC: Consultation on cycle superhighway extension plans

The remarks buoyed investor hopes that the central bank's cycle of 17 interest rate hikes is near an end.

FORBES: Stocks Soar On Bernanke's Remarks

Western farm-support programs and cheap cotton dumped on the world market are impeding efforts to end Africa's cycle of poverty.

NPR: U.S., European Subsidies Undercut African Farmers