前期的英文：
the time period preceeding some other time
prophase
prior period
previous period
protophase
earlier stage
early days
Entrepreneurship before, during and after dot-com
网络公司的前期、中期与后期创业
13 Hole volumes includes previous casing volume.
(泥浆设计中的)井眼体积包括前期套管的体积。
The stage in prophase of meiosis during which homologous chromosomes become paired.
偶线期减数分裂的前期阶段，在此期间异体同型的染色体配对
During the early period of their tenure of office, that generation of leaders was good.
这一代的前期是好的
Organize technical communication with both supplier in prophase
组织供应商前期开发的技术沟通
With good preparations, he got his graduation thesis done at one go.
由于前期准备充分,他的毕业论文一气呵成。
Much advance publicity was given to the talks.
对于这次会谈有很多前期报道。
At the onset of mitosis, prophase, the nucleolus breaks down
有丝分裂的开始称为前期，核仁消失。
Recently published figures show a divergence from previous trends.
最近公布的数字表明，目前情况与前期趋势相背离。
Molecular clouds play an integral role in the prestellar evolutionary sequence of interstellar matter
分子云在星际物质的星前期演化序列中起着不可缺少的作用。
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。
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。