As we age, cell turnover slows and dead skin cells pile up all over our face.

As we know, lots of kinds of birds will migrate when the seasons changed.

正如我们所知, 许多鸟都会在季节更替的时候迁徙.

Every hair has the cycle of replace of life and death.

每根头发都有生死更替的周期.

The most serious threat to Exxon is replacing reserves.

对埃克森最大的威胁来自石油储备地的更替.

Bright warm days follow clear cool nights.

明媚温暖的白天和清澈而凉爽的夜晚交相更替.

For the moment, she could scarcely forgive the substitution.

这会儿, 她没法子宽恕这种更替.

There has been very little renewal of personnel in higher education.

从事高等教育的人员新老更替极其缓慢。

John and Bill changed off at riding the bicycle.

约翰和比尔轮换着骑这辆自行车.

A novel parameter calibration method, named branch-in-turn calibration, is presented.

提出了一种新的参数标定法, 称作分支轮换标定法.

Is provision made for periodic rotation of procurement personnel?

是否有定期轮换采购中间人的机制存在?

Check the tire manufacturer's recommendations-different tires have different rotation patterns.

查询轮胎生产厂家说明介绍,不同类型的轮胎有不同的轮换方式.

Change the left wheel of Mr. Green's car.

把格林先生车子的左轮换掉.

The sun appears to rise and set because of the earth's rotation.

因为地球在自转,看上去就有了日出和日落.

The revolution of the earth causes day and night.

地球的自转形成白天和夜晚.

Most farmers alternate their crops.

多数农民实行轮作.

Rotation farming requires soil culture twice a year.

轮作需要一年耕种两次.

Pasture, both temporary and permanent, is a relatively cheap source of nutrients.

无论永久草场, 还是轮作草场, 都是比较廉价的营养资源.

Most of it has been retained in alternate husbandry.

其中大部分成为轮作草地.

The physical origin of the gauge transformation is a mystery.

这个规范变换的物理起因还是个谜.

All of us can change our behavior to fit different situations.

我们都能依据不同的场合变换我们的言谈举止.

They hae found that it is connected with theof days and the phases of the moon.

他们发现代码与昼夜更迭和月亮圆缺有关.