分毫的英文：
fraction; iota

参考例句：

Sticks and stones may break my bones,but words will never hurt me.
棍子及石头会打断骨头，而言语却绝不会伤害分毫。

The gleam of a thousand lights is often as effective as the persuasive light in a wooing and fascinating eye.
都市的万点灯火比起情人脉脉含情的迷人眼神来，那魅力是不差分毫的呢。

fraction是什么意思：
n. 小部分，少量，一点儿；分数，小数

Could you move a fraction closer?
你能不能稍微再挪近点儿？

In this case the fractional part is discarded.
在此情况下小数部分被丢掉了。

You do fractions, then you do decimals.
你先学习分数，然后，学习小数。

One forth is a proper fraction.
四分之一是一个真分数。

Fraction is really complicated.
分数真是复杂。

iota是什么意思：
n. 希腊语字母第9位,极微小