一刀切的英文：
allow no flexibility

参考例句：

non-discretionary implementation;Universal application
一刀切

We should not impose uniformity on the implementation of the policies
政策上不搞一刀切

The impulse to invest ethically is praiseworthy, but I'm skeptical of "one size fits all" approaches to it
促进合乎道义的投资是值得赞赏的，但我怀疑这种“一刀切”的做法能否行得通。

allow是什么意思：
v. 允许，许可；给予，让…得到；承认；允许进入；接受；听任

This agenda does not allow compromise.
这一议程容不得商量。

Allow me to introduce myself.
允许我把我自己向你介绍。

The ship was dry and no liquor was allowed.
船上是禁酒的，不准卖含酒精的饮料。

Allow ten minutes for washup.
给予十分钟洗涤时间。

Ladies are allowed to unmake their minds.
女士们可以改变主意。

flexibility是什么意思：
n. 柔韧性，机动性，灵活性

A broad, flexible part, such as a flipper.
拍击物象鸭脚板似的宽而有弹性的物体

A piece of rubber hose is flexible.
橡皮管可以弯曲。

Allow flexibility in the policy and enliven the economy
放开搞活

It pays to stay flexible, unattached, and uncommitted.
基因宁愿为保持灵活、独立和自由付出些代价。

a solid piece of fibreboard, flexible, waterproof
不但防水，还具有弹性。