一段时间的英文：
cycle
period of time
spell
stretch
while

参考例句：

For a short time; not for long
有一段时间;暂时

One day is a period of twenty-four hours.
一天是二十四小时的一段时间。

Gold prices on the London market are expected to flatten out after a period of fluctuation.
一段时间的波动后，预料伦敦市场的黄金价格将稳定下来了。

The detached crystals slithered down the rock face for a moment and then made no further sound
散开的晶体在岩石表面滑了一段时间就再也没有声音了

Payment is made in arrears,ie at the end of the period in which eg the work was done.
后行付款(在最后的一段时间付款,例如工作完成后).

Simon's business has been on the rocks for some time and I understand he's going into liquidation.
西蒙的生意遇到经济困难已有一段时间，我想他即将进行破产清算。

These rumblings led Gingrich recently to declare that he would take a seat on the "bench": for a while
这些普遍的抱怨促使金里奇最近宣布，他将在一段时间里不参加活动。

He crouched there for a long time before he hit upon a plan to defeat his antagonist.
他蹲在那里很长一段时间后，突然想出了一个挫败他对手的计划。

For a long time, I watched them scurrying around the base of the tree in bewilderment.
在很长一段时间里，我看见蚂蚁还在围着胶带团团转，不知所措。

You've been working out regularly for quite a while, but you're nowhere near1 your fitness goals.
你经常做健身运动已有相当长一段时间了，但是你的健身目标仍然遥不可及。

cycle是什么意思：
n. 循环，周期；自行车；整个系列
v.（使）循环，（使）轮转；骑自行车

Then the market cycle overtook the political cycle.
当时，市场周期超越了政治周期。

The seasons of the year make a cycle.
一年四季构成一个循环。

The pedal of a cycle is attached to a crank.
自行车的踏板与曲柄相连。

period是什么意思：
n. 时间；时期；周期；经期；课时；局；句号
adj. 某一时期的；当时特有的

juvenile period
幼年期(构成中心木质部的一段时期)

But this is a transitional period.
但这是个转变过程。

The period includes the legal period and the period designated by the people's court.
期间包括法定期间和人民法院指定的期间。

time是什么意思：
n. 时间；（一段）时光；时机；机会；历史时期；时代；次；回；倍
v. 测定…所花时间；调准；调整；测定…所花时间
adj. 时间的；定时的；定期的；分期的

discrimination time
辨别时间辨别时间

It is time to go.
该走了。

They are not in step with the times.
他们跟不上时代的步伐。