根本上的英文：
at bottom
at root
at the bottom
primarily

参考例句：

galileo departed radically from the Greeks
伽利略根本上不同于希腊人。

There was a very basic similarity in our philosophy.
我们的人生哲学在根本上很相似。

This is at root a question of biology.
这根本上是一个生物学问题。

The development of things depends fundamentally on internal causes
事物的发展根本上是由内因决定的。

The development of things depends fundamentally on internal causes.
事物的发展根本上是由内因决定的。

This ethical doctrine holds that people are basically selfish and egoistic
这种伦理观念认为，人在根本上是自私的，自我本位的。

If we can become clear on all these problems,we shall arrive at a fundamental understanding of materialist dialectics.
如果我们将这些问题都弄清楚了，我们就在根本上懂得了唯物辩证法。

bottom是什么意思：
n. 底部；末端；尽头；臀部
adj. 底部的
v. 装底；建立基础；到达底部

reach the bottom
到达底部

Get to the bottom of
弄个水落石出

Look, the bottom is bubbly!
看，鞋底有有很多泡泡呢！

root是什么意思：
n. 根；根源；根基；词根；祖先
v. 生根；根源在于，来源于

nematode damage to the soybean roots is characterized by coarse roots
线虫破坏大豆根系的特征是:根系粗糙。

These plants have very deep roots.
这些植物的根长得很深。

Hope is the root of hopeful.
hope是hopeful的词根。

primarily是什么意思：
adv. 首先；起初，原来；首要地，主要地；根本上

It is caused primarily by allergy or respiratory infection.
若从病因论，哮喘可分为过敏反应性、炎症性和神经性。

These books are primarily designed for the use of beginners.
这些书主要是供初学的人使用的。

urbanized industry was limited primarily to the Northeast
城市工业主要局限于东北部。